Measurement of the Splitting Function in pp and Pb-Pb Collisions at ffiffiffiffiffiffiffiffi sNN p = 5.02 TeV A.M. Sirunyan et al. * (CMS Collaboration) (Received 30 August 2017; published 3 April 2018) Data from heavy ion collisions suggest that the evolution of a parton shower is modified by interactions with the color charges in the dense partonic medium created in these collisions, but it is not known where in the shower evolution the modifications occur. The momentum ratio of the two leading partons, resolved as subjets, provides information about the parton shower evolution. This substructure observable, known as the splitting function, reflects the process of a parton splitting into two other partons and has been measured for jets with transverse momentum between 140 and 500 GeV, in pp and PbPb collisions at a center-of- mass energy of 5.02 TeV per nucleon pair. In central PbPb collisions, the splitting function indicates a more unbalanced momentum ratio, compared to peripheral PbPb and pp collisions.. The measurements are compared to various predictions from event generators and analytical calculations. DOI: 10.1103/PhysRevLett.120.142302 Scattering processes with large momentum transfer Q between the partonic constituents of colliding nucleons occur early in heavy ion collisions. Further interactions of the outgoing partons with the produced (colored) hot and dense quantum chromodynamics (QCD) medium (the quark-gluon plasma, QGP) may modify the angular and momentum distributions of final-state hadronic jet frag- ments relative to those in proton-proton collisions. This process, known as jet quenching, can be used to probe the properties of the QGP [1,2]. Jet quenching was first observed at the Relativistic Heavy Ion Collider [3–9] and then at the Large Hadron Collider (LHC) [10–25]. This Letter reports an attempt to isolate parton splittings to two well separated partons with high transverse momentum (pT), probing medium induced effects during the parton shower evolution in the QGP. Information about these leading partons of a hard splitting can be obtained by removing the softer wide-angle radiation contributions, done through the use of jet grooming algorithms that attempt to split (“decluster”) a single jet into two subjets [26–30]. For a parton shower in vacuum, these subjets provide access to the properties of the first splitting in the parton evolution [31,32]. Interactions of the two outgoing partons with the QGP potentially modify the properties of subsequent splittings resulting in different subjet proper- ties. This Letter reports a study of hard parton splittings in pp and PbPb collisions. An observable characterizing the parton splitting, denoted by zg, is defined as the ratio between the pT of the less energetic subjet, pT;2, and the pT sum of the two subjets [32], zg ¼ pT;2=ðpT;1 þ pT;2Þ. A measurement of the zg distribution in pp collisions, using CMS open data, was recently reported [33,34]. In PbPb collisions, this measurement reflects how the two color-charged partons produced in the first splitting propagate through the QGP, probing the role of color coherence of the jet in the medium [35]. If the partons act as a single coherent emitter, the two subjets will be equally modified, leaving zg unaffected [36]. If, instead, the partons in the medium act as decoherent emitters, the two subjets should be modified differently, thereby altering zg. In addition, zg is sensitive to semihard medium-induced gluon radiation [37], modifications of the initial parton splitting [38], and the medium response [39]. The analysis uses data collected by the CMS experiment in 2015. The PbPb and pp data samples, both at a nucleon- nucleon center-of-mass energy of 5.02 TeV, correspond to integrated luminosities of 404 μb−1 and 27.4 pb−1, respec- tively. The central feature of the CMS apparatus is a superconducting solenoid of 6 m internal diameter, provid- ing a magnetic field of 3.8 T. Within the solenoid volume are a silicon pixel and strip tracker, a lead tungstate crystal electromagnetic calorimeter, and a brass and scintillator hadron calorimeter, each composed of a barrel and two endcap sections. Forward calorimeters extend the pseudor- apidity, η, coverage provided by the barrel and endcap detectors. A more detailed description of the CMS detector, together with a definition of the coordinate system used and the relevant kinematic variables, can be found in Ref. [40]. The particle-flow (PF) algorithm reconstructs and iden- tifies each individual particle with an optimized combina- tion of information from the various elements of the CMS detector [41]. The PF candidates identified as a photon or a *Full author list given at the end of the article. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. PHYSICAL REVIEW LETTERS 120, 142302 (2018) Editors' Suggestion Featured in Physics 0031-9007=18=120(14)=142302(17) 142302-1 © 2018 CERN, for the CMS Collaboration https://crossmark.crossref.org/dialog/?doi=10.1103/PhysRevLett.120.142302&domain=pdf&date_stamp=2018-04-03 https://doi.org/10.1103/PhysRevLett.120.142302 https://doi.org/10.1103/PhysRevLett.120.142302 https://doi.org/10.1103/PhysRevLett.120.142302 https://doi.org/10.1103/PhysRevLett.120.142302 https://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0/ neutral hadron are treated as massless, while for charged hadrons the pion mass is assumed. The electron and muon PF candidates are assigned the corresponding lepton masses. Jets are reconstructed from the PF candidates using the anti-kT jet algorithm [42–44] with a distance parameter R ¼ 0.4. The kinematics of the jet are deter- mined using the vectorial sum of all particle momenta in the jet. For this analysis, jets are required to have pT;jet > 140 GeV and jηj < 1.3. The online event selection trigger also uses the anti-kT algorithm with R ¼ 0.4 but applies a lower threshold on pT;jet; all events with a PF jet with pT;jet > 80 GeV were recorded in the pp case, while in PbPb collisions the triggers (based on jets reconstructed from calorimeter deposits including a subtraction for the uncorrelated under- lying event) use a 100 GeV threshold. Noncollision events, such as beam-gas interactions or cosmic-ray muons, are rejected offline [19]. The events are required to have a primary vertex reconstructed within 15 cm (0.15 cm) of the nominal interaction point along the beam direction (in the transverse plane). The average number of additional colli- sions per bunch crossing is less than 0.9 in both data sets, having a negligible effect on the measurement. The PbPb event sample is divided into centrality intervals, reflecting the impact parameter of the colliding nuclei, using the percentage of the total inelastic hadronic cross section, which is evaluated using the sum of the total energy deposited in both forward hadron calorimeters, covering the 3 < jηj < 5 range [45]. The PYTHIA 6.423 [46] event generator (tune Z2* [47,48]) is used to calculate Monte Carlo (MC) corrections. For PbPb simulations, the PYTHIA 6 events are embedded into an underlying event produced with HYDJET 1.9 [49]. All generated events undergo a full GEANT4 [50] simulation of the CMS detector response. Additional cross check samples are produced with PYTHIA 8.212 [51] (tune CUETP8M1 [48]) and HERWIG++ [52] (tune EE5C [53]). In PbPb collisions, the constituents of the jet are corrected for the underlying event contribution using the “constituent subtraction” method [54], a particle-by- particle approach that removes or corrects jet constituents based on the average underlying event density. The sub- traction corrects both the four-momentum of the jet and its substructure. Underlying event densities are determined by calculating the median pT per unit area, ρ, and a density term related to the jet mass, ρm, using a procedure in which all of the particles in the event are clustered into jets using the kT algorithm with R ¼ 0.4 [42,43,55]. To match the jets used in this analysis, only kT jets with jηj < 1.3 are included in the density determination. The influence of true hard jet fragments on the background estimation is reduced by excluding the two leading kT jets. The con- stituent-subtracted jets are corrected for the detector response with jet energy corrections derived from inde- pendent pp and PbPb simulations. Additional corrections for the mismodeling of the detector response are also applied [56]. Jet grooming algorithms aim to isolate the hard prongs of a jet and remove soft wide-angle radiation. The “soft drop” declustering procedure, used in this analysis, is an exten- sion of the modified mass drop tagger [29]. The procedure starts by selecting an anti-kT jet that has already been constituent-subtracted and reclustered with the Cambridge- Aachen algorithm [57] to form a pairwise clustering tree with an angular-ordered structure. A pairwise declustering is performed on this tree. In each step of the declustering, a branching into two subjets is accepted if they pass the soft drop condition [30], minðpT;i; pT;jÞ pT;i þ pT;j > zcut � ΔRij R0 � β ; ð1Þ where the subscripts “i” and “j” indicate the subjets at that step of the declustering, ΔRij is the distance between the two subjets in the η-ϕ plane, R0 is the cone size of the anti- kT jet, and zcut is an adjustable parameter. If the soft drop condition is not satisfied, the softer subjet is dropped. For this study, zcut is set to 0.1 [30]. The parameter β is set to 0, which satisfies an extended version of infrared and collin- ear safety by absorbing the collinear divergences into a generalized fragmentation function recovering the QCD splitting function [32]. Once the soft drop condition is satisfied, the two subjets at that position in the tree are used in the analysis. If the soft drop condition is never satisfied, the jet is not used. This is the case for 1.5% of the jets measured at pT;jet ¼ 140 GeV, increasing to 3.0% at pT;jet ¼ 300 GeV, independent of collision centrality. Groomed jets with a small distance between the two subjets frequently result from the ambiguous case where the two subjets cannot be distinctly resolved, leading to a significant misassignment of particle constituents to sub- jets. An additional selection of ΔR12 > 0.1 is applied, removing 40% (60%) of the jets measured at low (high) pT;jet, to avoid an unphysical modification of zg. This selection rejects an additional 15% (5%) of the jets at low (high) pT;jet in the 10% most central PbPb collisions, in comparison to the noncentral collisions, an effect well reproduced by the simulation. The systematic uncertainty on the zg variable is evaluated by varying the ΔR12 minimum distance requirement by its one standard deviation MC resolution of 10%; this variation results in a 2% uncertainty, independent of centrality. The transverse momentum of the jet after grooming, pT;g, is identical to or smaller than the original pT;jet. The groomed pT fraction, pT;g=pT;jet, is compared to simula- tions in Fig. 1 for jets with 160 < pT;jet < 180 GeV, in pp and central PbPb collisions. The measured and simulated distributions are in agreement. The potential bias due to the online jet trigger is evaluated by using events collected with a lower threshold PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-2 and also minimum bias events. For the 10% most central PbPb collisions, a bias is found in the lowest pT;jet range, 140 < pT;jet < 160 GeV, changing the yield by values linearly decreasing from þ6% at zg ¼ 0.1 to −15% at zg ¼ 0.5. In the 10%–30% centrality class, the bias is half as large, and it vanishes for more peripheral events. The full bias is corrected for and the magnitude of the correction is treated as a zg systematic uncertainty. The trigger has no effect on the measurements at higher pT;jet. The systematic uncertainty in the jet energy scale, on the measured and simulated distributions, is obtained by propagating the uncertainties in the jet response correction [56,58]. A maximum deviation in yield of 4% is found in central PbPb collisions, decreasing to 2% in pp and peripheral PbPb collisions. This effect tends to increase (decrease) the pT of the leading (subleading) subjet. The systematic uncertainty in the normalization of the zg distributions is estimated to be 5% (3%) in central (periph- eral) collisions. The relative uncertainty in the jet energy resolution is 10%, leading to an uncertainty smaller than 0.5% on the zg distribution. Figure 2 shows the zg distribution measured in pp collisions, together with results obtained with PYTHIA 6, PYTHIA 8, and HERWIG++, including a full simulation of detector effects. Both PYTHIA simulations have a slightly steeper zg distribution than the data, while HERWIG++ shows an opposite trend. To compare the zg distribution in pp and PbPb colli- sions, in given pT;jet and centrality ranges, the measure- ments in pp collisions are adjusted to match the subjet resolution in PbPb data. The resolution correction is derived, for each pT;jet and collision centrality range, from full detector simulation studies of the ratio of the zg distributions between PYTHIA and PYTHIA embedded into HYDJET. The ratio between simulated PbPb and pp zg distributions shows a relative decrease in the number of PbPb events at high zg, reaching ∼40% in central collisions and negligible in peripheral collisions. The uncertainty in the correlation between the response of the two subjets is estimated by varying the individual subjet resolution by 10%, the relative correlation by 15%, and the subjet energy scale by 5%, corresponding to one standard deviation in resolution. This results in an uncertainty of 8%–10% in zg. The mismodeling of the zg distribution in PYTHIA, evalu- ated by reweighting to the zg measurement in pp collisions, adds an uncertainty of 4%–5%. These uncertainties are assigned to the “smeared” pp data points. The resolution correction is validated with a parametric resolution model that uses the jet resolution and a sampled zg in each pT;jet range, and recreates the correction function for each centrality selection by sampling the individual subjet resolutions. Figure 3 shows the zg distributions measured in PbPb collisions, for several centrality intervals, in comparison to the smeared pp reference data. The systematic uncertain- ties on the zg distributions are fully correlated from point to point, resulting in an anticorrelated uncertainty on the self-normalized distributions, and are uncorrelated between the pp and PbPb data sets. The zg distribution in peripheral PbPb collisions agrees with the pp reference, while the more central collisions exhibit a steeper zg distribution. Differences between the zg of quark- and gluon-initiated jets are found to be a few percent [32], so that the observed modification cannot be attributed to the flavor composition within a fixed pT;jet interval. The observation indicates that the splitting into two branches becomes increasingly more unbalanced as the PbPb collisions become more central. T,jet /p T,g p 0.5 0.6 0.7 0.8 0.9 1 ) T ,je t /p T ,g d( p dN je t N1 1−10 1 10 210 PbPb 0-10% PYTHIA6+HYDJET 0-10% pp PYTHIA6 -1bμ, PbPb 404 -1 = 5.02 TeV, pp 27.4 pbNNs < 180 GeV T,jet 160 < p | < 1.3 jet η R = 0.4, |Tanti-k = 0.1 cut = 0, zβSoft Drop > 0.112RΔ CMS FIG. 1. Groomed jet energy fraction in pp and in the 10% most central PbPb collisions, for jets with 160 < pT;jet < 180 GeV and jηjetj < 1.3. The pp (PbPb) data are compared to PYTHIA 6 (embedded in HYDJET) distributions. g dzdN je t N1 CMS -1 = 5.02 TeV 27.4 pbspp > 0.112RΔ = 0.1, cut = 0, zβSoft Drop < 180 GeV T,jet 160 < p Tanti-k R = 0.4 | < 1.3 jet η| Data PYTHIA6 PYTHIA8 HERWIG++ g M C /d at a z 0.1 0.2 0.3 0.4 0.5 0 2 4 6 8 10 0.8 1 1.2 FIG. 2. The zg distribution in pp collisions for 160 < pT;jet < 180 GeV, compared to predictions from event generators. The error bars (shaded area) represent the statistical (systematic) uncertainty. PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-3 The modification of the zg distribution in central PbPb collisions is shown in Fig. 4 over a wide kinematic range in pT;jet. The measurement is compared to a prediction of the JEWEL event generator (shownwith statistical and theoretical uncertainties originating from the treatment of the medium response), which incorporates medium-induced interactions while the partons propagate through the QGP [39,59,60]. The measurement is also compared with a soft-collinear effective theory (SCET) with Glauber gluon interactions [38] for two different quenching strengths,with a calculation incorporating multiple medium-induced gluon bremsstrah- lung (BDMPS) [2,61,62] assuming that the two hard partons radiate gluons as a coherent emitter [37], and with a higher twist (HT) approach employing both coherent and incoher- ent energy loss [63]. Each of the three models is presented for two settings of the parameters reflecting their medium properties, as indicated in the legends, where L is the medium length, q̂ and q̂0 denote medium transport coef- ficients, and g is the coupling strength between the jet and the medium.TheBDMPSmedium effect is tooweak to describe the observed pT;jet dependence, while the other models reproduce the data at low and high pT;jet, using medium properties previously tuned to match measurements of the nuclearmodification factors of charged hadrons and jets. For the HT calculation, the presence or absence of color coherence makes a significant difference. Since the detector resolution effects have a negligible impact on the theoretical calculations, given that they largely cancel in the PbPb to (smeared)pp ratio, the theoretical curves are shownwithout detector smearing. gz 0 0.1 0.2 0.3 0.4 0.5 g d N /d z je t 1/ N 1 10 210 310 410 50-80% 200)× ( 50-80% 200)× ( 30-50% 50)× ( 30-50% 50)× ( 10-30% 10)× ( 10-30% 10)× ( 0-10% 1)× ( 0-10% 1)× ( PbPb pp smeared CMS | < 1.3 jet η R = 0.4, |Tanti-k < 180 GeV T,jet 160 < p = 0.1 cut = 0, zβSoft Drop, > 0.112RΔ -1bμ, PbPb 404 -1 = 5.02 TeV, pp 27.4 pbNNs gz 0 0.1 0.2 0.3 0.4 0.5 P bP b/ pp s m ea re d 0 1 2 3 4 0 1 1 1 1 2 50-80% 30-50% 10-30% 0-10% FIG. 3. The zg distributions in PbPb collisions for 160 < pT;jet < 180 GeV, in several centrality ranges, compared to pp data smeared to account for the differences in resolution. The error bars (shaded area) represent the statistical (systematic) uncertainty. gz 0 0.1 0.2 0.3 0.4 0.5 P bP b/ pp s m ea re d 0 1 2 3 4 5 6 7 0-10% Data JEWEL Coherent antenna BDMPS /fm, L = 5 fm2 = 1 GeVq /fm, L = 5 fm2 = 2 GeVq T,jet p (GeV) 140-160 160-180 180-200 200-250 SCET Chien-Vitev g = 1.8 g = 2.2 /fm2 = 4 GeV 0 qHT coherent incoherent 250-300 300-500 CMS | < 1.3 jet η R = 0.4, |Tanti-k > 0.112RΔ = 0.1, cut = 0, zβSoft Drop 0 1 1 1 1 1 1 2 -1bμ, PbPb 404 -1 = 5.02 TeV, pp 27.4 pbNNs FIG. 4. Ratios of zg distributions in PbPb and smeared pp collisions in the 10%most central events, for several pT;jet ranges, compared to various jet quenching theoretical calculations [37–39,63]. The error bars (shaded area) represent the statistical (systematic) uncertainty. The diagonally hatched band denotes the uncertainty from the treatment of the medium response using the JEWEL event generator. PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-4 In summary, the first measurement of the splitting function in pp and PbPb collisions at a center-of-mass energy of 5.02TeVper nucleonpair has been presented. This represents the first application of a grooming technique to PbPb data, removing soft wide-angle radiation from the jet and thereby isolating the two leading subjets. The momentum sharing between these subjets is used to obtain information about hard parton splitting processes during the shower evolution. The PYTHIA and HERWIG++ event generators reproduce the measured splitting function in pp and peripheral PbPb collisions, at the level of 15%. In central PbPb collisions, a steeper zg distribution is observed, indicating that the parton splitting process is modified by the hot medium created in heavy ion collisions. These results provide new insight into the role of color coherence and other attributes of the interactions of partons in the quark-gluon plasma. We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowl- edge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWFWand FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); SENESCYT (Ecuador); MoER, ERC IUT, and ERDF (Estonia); Academy of Finland,MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); LAS (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan);MSHEandNSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS, RFBR and RAEP (Russia); MESTD (Serbia); SEIDI, CPAN, PCTI and FEDER (Spain); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC (United Kingdom); DOE and NSF (USA). [1] M. Gyulassy and M. Plumer, Jet quenching in dense matter, Phys. Lett. B 243, 432 (1990). [2] R. Baier, Yu. L. Dokshitzer, S. Peigné, and D. Schiff, Induced gluon radiation in a QCD medium, Phys. Lett. B 345, 277 (1995). [3] K. Adcox et al. (PHENIX Collaboration), Suppression of Hadrons with Large Transverse Momentum in Central Auþ Au Collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 130 GeV, Phys. Rev. Lett. 88, 022301 (2001). [4] S. S. Adler et al. (PHENIX Collaboration), Suppressed π0 Production at Large Transverse Momentum in Central Auþ Au Collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 200 GeV, Phys. Rev. Lett. 91, 072301 (2003). [5] J. Adams et al. (STAR Collaboration), Transverse Momen- tum and Collision Energy Dependence of High pT Hadron Suppression in Auþ Au Collisions at Ultrarelativistic Energies, Phys. Rev. Lett. 91, 172302 (2003). [6] I. Arsene et al. (BRAHMS Collaboration), Transverse Momentum Spectra in Auþ Au and dþ Au Collisions atffiffiffiffiffiffiffiffi sNN p ¼ 200 GeV and the Pseudorapidity Dependence of High pT Suppression, Phys. Rev. Lett. 91, 072305 (2003). [7] B. B. Back et al. (PHOBOS Collaboration), Charged hadron transverse momentum distributions in Auþ Au collisions atffiffiffiffiffiffiffiffi sNN p ¼ 200 GeV, Phys. Lett. B 578, 297 (2004). [8] L. Adamczyk et al. (STAR Collaboration), Dijet Imbalance Measurements in Auþ Au and pp Ccollisions at ffiffiffiffiffiffiffiffi sNN p ¼ 200 GeV at STAR, Phys. Rev. Lett. 119, 062301 (2017). [9] L. Adamczyk et al. (STAR Collaboration), Measurements of jet quenching with semi-inclusive hadronþ jet distributions in Auþ Au collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 200 GeV, Phys. Rev. C 96, 024905 (2017). [10] ALICE Collaboration, Suppression of charged particle production at large transverse momentum in central Pb–Pb collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV, Phys. Lett. B 696, 30 (2011). [11] ALICE Collaboration, Particle-Yield Modification in Jetlike Azimuthal Dihadron Correlations in Pb-Pb Collisions atffiffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV, Phys. Rev. Lett. 108, 092301 (2012). [12] ATLAS Collaboration, Measurement of charged-particle spectra in Pbþ Pb collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV with the ATLAS detector at the LHC, J. High Energy Phys. 09 (2015) 050. [13] CMS Collaboration, Study of high-pT charged particle suppression in PbPb compared to pp collisions atffiffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV, Eur. Phys. J. C 72, 1945 (2012). [14] ATLAS Collaboration, Observation of a Centrality- Dependent Dijet Asymmetry in Lead-Lead Collisions atffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV with the ATLAS Detector at the LHC, Phys. Rev. Lett. 105, 252303 (2010). [15] CMS Collaboration, Jet momentum dependence of jet quenching in PbPb collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV, Phys. Lett. B 712, 176 (2012). [16] ATLAS Collaboration, Measurement of the jet radius and transverse momentum dependence of inclusive jet suppres- sion in lead-lead collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV with the ATLAS detector, Phys. Lett. B 719, 220 (2013). [17] ALICE Collaboration, Measurement of charged jet sup- pression in Pb-Pb collisions at ffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV, J. High Energy Phys. 03 (2014) 013. [18] ALICE Collaboration, Measurement of jet suppression in central Pb-Pb collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV, Phys. Lett. B 746, 1 (2015). [19] CMS Collaboration, Charged-particle nuclear modification factors in PbPb and pPb collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 5.02 TeV, J. High Energy Phys. 04 (2017) 039. PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-5 https://doi.org/10.1016/0370-2693(90)91409-5 https://doi.org/10.1016/0370-2693(94)01617-L https://doi.org/10.1016/0370-2693(94)01617-L https://doi.org/10.1103/PhysRevLett.88.022301 https://doi.org/10.1103/PhysRevLett.88.022301 https://doi.org/10.1103/PhysRevLett.91.072301 https://doi.org/10.1103/PhysRevLett.91.072301 https://doi.org/10.1103/PhysRevLett.91.172302 https://doi.org/10.1103/PhysRevLett.91.072305 https://doi.org/10.1016/j.physletb.2003.10.101 https://doi.org/10.1103/PhysRevLett.119.062301 https://doi.org/10.1103/PhysRevC.96.024905 https://doi.org/10.1103/PhysRevC.96.024905 https://doi.org/10.1016/j.physletb.2010.12.020 https://doi.org/10.1016/j.physletb.2010.12.020 https://doi.org/10.1103/PhysRevLett.108.092301 https://doi.org/10.1007/JHEP09(2015)050 https://doi.org/10.1007/JHEP09(2015)050 https://doi.org/10.1140/epjc/s10052-012-1945-x https://doi.org/10.1103/PhysRevLett.105.252303 https://doi.org/10.1016/j.physletb.2012.04.058 https://doi.org/10.1016/j.physletb.2012.04.058 https://doi.org/10.1016/j.physletb.2013.01.024 https://doi.org/10.1007/JHEP03(2014)013 https://doi.org/10.1007/JHEP03(2014)013 https://doi.org/10.1016/j.physletb.2015.04.039 https://doi.org/10.1016/j.physletb.2015.04.039 https://doi.org/10.1007/JHEP04(2017)039 [20] ALICE Collaboration, Measurement of jet quenching with semi-inclusive hadron-jet distributions in central Pb-Pb collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV, J. High Energy Phys. 09 (2015) 170. [21] CMS Collaboration, Modification of jet shapes in PbPb collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV, Phys. Lett. B 730, 243 (2014). [22] CMS Collaboration, Measurement of jet fragmentation in PbPb and pp collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV, Phys. Rev. C 90, 024908 (2014). [23] ATLAS Collaboration, Measurement of jet fragmentation in Pbþ Pb and pp collisions at ffiffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV with the ATLAS detector at the LHC, Eur. Phys. J. C 77, 379 (2017). [24] ALICE Collaboration, First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC, Phys. Lett. B 776, 249 (2018). [25] CMS Collaboration, Measurement of transverse momentum relative to dijet systems in PbPb and pp collisions atffiffiffiffiffiffiffiffi sNN p ¼ 2.76 TeV, J. High Energy Phys. 01 (2016) 006. [26] S. D. Ellis, C. K. Vermilion, and J. R. Walsh, Recombination algorithms and jet substructure: Pruning as a tool for heavy particle searches, Phys. Rev. D 81, 094023 (2010). [27] J. M. Butterworth, A. R. Davison, M. Rubin, and G. P. Salam, Jet Substructure as a New Higgs Search Channel at the LHC, Phys. Rev. Lett. 100, 242001 (2008). [28] D. Krohn, J. Thaler, and L.-T. Wang, Jet trimming, J. High Energy Phys. 02 (2010) 084. [29] M. Dasgupta, A. Fregoso, S. Marzani, and G. P. Salam, Towards an understanding of jet substructure, J. High Energy Phys. 09 (2013) 029. [30] A. J. Larkoski, S. Marzani, G. Soyez, and J. Thaler, Soft drop, J. High Energy Phys. 05 (2014) 146. [31] G. Altarelli and G. Parisi, Asymptotic freedom in parton language, Nucl. Phys. B126, 298 (1977). [32] A. J. Larkoski, S. Marzani, and J. Thaler, Sudakov safety in perturbative QCD, Phys. Rev. D 91, 111501 (2015). [33] A. Larkoski, S. Marzani, J. Thaler, A. Tripathee, and W. Xue, Exposing the QCD Splitting Function with CMS Open Data, Phys. Rev. Lett. 119, 132003 (2017). [34] A. Tripathee, W. Xue, A. Larkoski, S. Marzani, and J. Thaler, Jet substructure studies with CMS open data, Phys. Rev. D 96, 074003 (2017). [35] Y. Mehtar-Tani and K. Tywoniuk, Jet (de)coherence in Pb–Pb collisions at the LHC, Phys. Lett. B 744, 284 (2015). [36] J. Casalderrey-Solana, Y. Mehtar-Tani, C. A. Salgado, and K. Tywoniuk, New picture of jet quenching dictated by color coherence, Phys. Lett. B 725, 357 (2013). [37] Y. Mehtar-Tani and K. Tywoniuk, Groomed jets in heavy- ion collisions: sensitivity to medium-induced bremsstrah- lung, J. High Energy Phys. 04 (2017) 125. [38] Y.-T. Chien and I. Vitev, Probing the Hardest Branching within Jets in Heavy-Ion Collisions, Phys. Rev. Lett. 119, 112301 (2017). [39] G. Milhano, U. A. Wiedemann, and K. C. Zapp, Sensitivity of jet substructure to jet-induced medium response, Phys. Lett. B 779, 409 (2018). [40] CMS Collaboration, The CMS experiment at the CERN LHC, J. Instrum. 3, S08004 (2008). [41] CMS Collaboration, Particle-flow reconstruction and global event description with the CMS detector, J. Instrum. 12, P10003 (2017). [42] M. Cacciari, G. P. Salam, and G. Soyez, Fastjet user manual, Eur. Phys. J. C 72, 1896 (2012). [43] M. Cacciari and G. P. Salam, Dispelling the N3 myth for the kt jet-finder, Phys. Lett. B 641, 57 (2006). [44] M. Cacciari, G. P. Salam, and G. Soyez, The anti-kt jet clustering algorithm, J. High Energy Phys. 04 (2008) 063. [45] CMS Collaboration, Observation and studies of jet quench- ing in PbPb collisions at nucleon-nucleon center-of-mass energy ¼ 2.76 TeV, Phys. Rev. C 84, 024906 (2011). [46] T. Sjöstrand, S. Mrenna, and P. Skands, PYTHIA 6.4 physics and manual, J. High Energy Phys. 05 (2006) 026. [47] CMS Collaboration, Study of the underlying event at forward rapidity in pp collisions at ffiffiffi s p ¼ 0.9, 2.76, and 7 TeV, J. High Energy Phys. 04 (2013) 072. [48] CMS Collaboration, Event generator tunes obtained from underlying event and multiparton scattering measurements, Eur. Phys. J. C 76, 155 (2016). [49] I. P. Lokhtin and A. M. Snigirev, A model of jet quenching in ultrarelativistic heavy ion collisions and high-pT hadron spectra at RHIC, Eur. Phys. J. C 45, 211 (2006). [50] S. Agostinelli et al. (GEANT4), GEANT4: A simulation toolkit, Nucl. Instrum. Methods, Phys. Res., Sect. A 506, 250 (2003). [51] T. Sjöstrand, S. Mrenna, and P. Skands, A brief introduction to PYTHIA 8.1, Comput. Phys. Commun. 178, 852 (2008). [52] M. Bähr, S. Gieseke, M. A. Gigg, D. Grellscheid, K. Hamilton, O. Latunde-Dada, S. Plätzer, P. Richardson, M. H. Seymour, A. Sherstnev, and B. R. Webber, Herwig++ physics and manual, Eur. Phys. J. C 58, 639 (2008). [53] M. H. Seymour and A. Siodmok, Constraining MPI models using σeff and recent Tevatron and LHC underlying event data, J. High Energy Phys. 10 (2013) 113. [54] P. Berta, M. Spousta, D. W. Miller, and R. Leitner, Particle- level pileup subtraction for jets and jet shapes, J. High Energy Phys. 06 (2014) 092. [55] G. Soyez, G. P. Salam, J.-H. Kim, S. Dutta, and M. Cacciari, Pileup Subtraction for Jet Shapes, Phys. Rev. Lett. 110, 162001 (2013). [56] CMS Collaboration, Determination of jet energy calibration and transverse momentum resolution in CMS, J. Instrum. 6, P11002 (2011). [57] Y. L. Dokshitzer, G. D. Leder, S. Moretti, and B. R. Webber, Better jet clustering algorithms, J. High Energy Phys. 08 (1997) 001. [58] CMS Collaboration, Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV, J. Instrum. 12, P02014 (2017). [59] K. C. Zapp, F. Krauss, and U. A. Wiedemann, A perturba- tive framework for jet quenching, J. High Energy Phys. 03 (2013) 080. [60] R. K. Elayavalli and K. C. Zapp, Medium response in JEWEL and its impact on jet shape observables in heavy ion collisions, J. High Energy Phys. 07 (2017) 141. [61] R. Baier, Y. L. Dokshitzer, A. H. Mueller, S. Peigné, and D. Schiff, Radiative energy loss of high-energy quarks and gluons in a finite volume quark-gluon plasma, Nucl. Phys. B483, 291 (1997). PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-6 https://doi.org/10.1007/JHEP09(2015)170 https://doi.org/10.1007/JHEP09(2015)170 https://doi.org/10.1016/j.physletb.2014.01.042 https://doi.org/10.1016/j.physletb.2014.01.042 https://doi.org/10.1103/PhysRevC.90.024908 https://doi.org/10.1103/PhysRevC.90.024908 https://doi.org/10.1140/epjc/s10052-017-4915-5 https://doi.org/10.1140/epjc/s10052-017-4915-5 https://doi.org/10.1016/j.physletb.2017.11.044 https://doi.org/10.1016/j.physletb.2017.11.044 https://doi.org/10.1007/JHEP01(2016)006 https://doi.org/10.1103/PhysRevD.81.094023 https://doi.org/10.1103/PhysRevLett.100.242001 https://doi.org/10.1007/JHEP02(2010)084 https://doi.org/10.1007/JHEP02(2010)084 https://doi.org/10.1007/JHEP09(2013)029 https://doi.org/10.1007/JHEP09(2013)029 https://doi.org/10.1007/JHEP05(2014)146 https://doi.org/10.1016/0550-3213(77)90384-4 https://doi.org/10.1103/PhysRevD.91.111501 https://doi.org/10.1103/PhysRevLett.119.132003 https://doi.org/10.1103/PhysRevD.96.074003 https://doi.org/10.1103/PhysRevD.96.074003 https://doi.org/10.1016/j.physletb.2015.03.041 https://doi.org/10.1016/j.physletb.2015.03.041 https://doi.org/10.1016/j.physletb.2013.07.046 https://doi.org/10.1007/JHEP04(2017)125 https://doi.org/10.1103/PhysRevLett.119.112301 https://doi.org/10.1103/PhysRevLett.119.112301 https://doi.org/10.1016/j.physletb.2018.01.029 https://doi.org/10.1016/j.physletb.2018.01.029 https://doi.org/10.1088/1748-0221/3/08/S08004 https://doi.org/10.1088/1748-0221/12/10/P10003 https://doi.org/10.1088/1748-0221/12/10/P10003 https://doi.org/10.1140/epjc/s10052-012-1896-2 https://doi.org/10.1016/j.physletb.2006.08.037 https://doi.org/10.1088/1126-6708/2008/04/063 https://doi.org/10.1103/PhysRevC.84.024906 https://doi.org/10.1088/1126-6708/2006/05/026 https://doi.org/10.1007/JHEP04(2013)072 https://doi.org/10.1140/epjc/s10052-016-3988-x https://doi.org/10.1140/epjc/s2005-02426-3 https://doi.org/10.1016/S0168-9002(03)01368-8 https://doi.org/10.1016/S0168-9002(03)01368-8 https://doi.org/10.1016/j.cpc.2008.01.036 https://doi.org/10.1140/epjc/s10052-008-0798-9 https://doi.org/10.1140/epjc/s10052-008-0798-9 https://doi.org/10.1007/JHEP10(2013)113 https://doi.org/10.1007/JHEP06(2014)092 https://doi.org/10.1007/JHEP06(2014)092 https://doi.org/10.1103/PhysRevLett.110.162001 https://doi.org/10.1103/PhysRevLett.110.162001 https://doi.org/10.1088/1748-0221/6/11/P11002 https://doi.org/10.1088/1748-0221/6/11/P11002 https://doi.org/10.1088/1126-6708/1997/08/001 https://doi.org/10.1088/1126-6708/1997/08/001 https://doi.org/10.1088/1748-0221/12/02/P02014 https://doi.org/10.1088/1748-0221/12/02/P02014 https://doi.org/10.1007/JHEP03(2013)080 https://doi.org/10.1007/JHEP03(2013)080 https://doi.org/10.1007/JHEP07(2017)141 https://doi.org/10.1016/S0550-3213(96)00553-6 https://doi.org/10.1016/S0550-3213(96)00553-6 [62] R. Baier, Y. L. Dokshitzer, A. H. Mueller, S. Peigné, and D. Schiff, Radiative energy loss and pT broadening of high- energy partons in nuclei, Nucl. Phys. B484, 265 (1997). [63] N.-B. Chang, S. Cao, and G.-Y. Qin, Probing medium- induced jet splitting and energy loss in heavy-ion collisions, arXiv:1707.03767. A. M. Sirunyan,1 A. Tumasyan,1 W. Adam,2 F. Ambrogi,2 E. Asilar,2 T. Bergauer,2 J. Brandstetter,2 E. Brondolin,2 M. Dragicevic,2 J. Erö,2 M. Flechl,2 M. Friedl,2 R. Frühwirth,2,b V. M. Ghete,2 J. Grossmann,2 J. Hrubec,2 M. Jeitler,2,b A. König,2 N. Krammer,2 I. Krätschmer,2 D. Liko,2 T. Madlener,2 I. Mikulec,2 E. Pree,2 N. Rad,2 H. Rohringer,2 J. Schieck,2,b R. Schöfbeck,2 M. Spanring,2 D. Spitzbart,2 W. Waltenberger,2 J. Wittmann,2 C.-E. Wulz,2,b M. Zarucki,2 V. Chekhovsky,3 V. Mossolov,3 J. Suarez Gonzalez,3 E. A. De Wolf,4 D. Di Croce,4 X. Janssen,4 J. Lauwers,4 H. Van Haevermaet,4 P. Van Mechelen,4 N. Van Remortel,4 S. Abu Zeid,5 F. Blekman,5 J. D’Hondt,5 I. De Bruyn,5 J. De Clercq,5 K. Deroover,5 G. Flouris,5 D. Lontkovskyi,5 S. Lowette,5 S. Moortgat,5 L. Moreels,5 Q. Python,5 K. Skovpen,5 S. Tavernier,5 W. Van Doninck,5 P. Van Mulders,5 I. Van Parijs,5 D. Beghin,6 H. Brun,6 B. Clerbaux,6 G. De Lentdecker,6 H. Delannoy,6 B. Dorney,6 G. Fasanella,6 L. Favart,6 R. Goldouzian,6 A. Grebenyuk,6 G. Karapostoli,6 T. Lenzi,6 J. Luetic,6 T. Maerschalk,6 A. Marinov,6 A. Randle-conde,6 T. Seva,6 E. Starling,6 C. Vander Velde,6 P. Vanlaer,6 D. Vannerom,6 R. Yonamine,6 F. Zenoni,6 F. Zhang,6,c A. Cimmino,7 T. Cornelis,7 D. Dobur,7 A. Fagot,7 M. Gul,7 I. Khvastunov,7,d D. Poyraz,7 C. Roskas,7 S. Salva,7 M. Tytgat,7 W. Verbeke,7 N. Zaganidis,7 H. Bakhshiansohi,8 O. Bondu,8 S. Brochet,8 G. Bruno,8 C. Caputo,8 A. Caudron,8 P. David,8 S. De Visscher,8 C. Delaere,8 M. Delcourt,8 B. Francois,8 A. Giammanco,8 M. Komm,8 G. Krintiras,8 V. Lemaitre,8 A. Magitteri,8 A. Mertens,8 M. Musich,8 K. Piotrzkowski,8 L. Quertenmont,8 A. Saggio,8 M. Vidal Marono,8 S. Wertz,8 J. Zobec,8 N. Beliy,9 W. L. Aldá Júnior,10 F. L. Alves,10 G. A. Alves,10 L. Brito,10 M. Correa Martins Junior,10 C. Hensel,10 A. Moraes,10 M. E. Pol,10 P. Rebello Teles,10 E. Belchior Batista Das Chagas,11 W. Carvalho,11 J. Chinellato,11,e E. Coelho,11 E. M. Da Costa,11 G. G. Da Silveira,11,f D. De Jesus Damiao,11 S. Fonseca De Souza,11 L. M. Huertas Guativa,11 H. Malbouisson,11 M. Melo De Almeida,11 C. Mora Herrera,11 L. Mundim,11 H. Nogima,11 L. J. Sanchez Rosas,11 A. Santoro,11 A. Sznajder,11 M. Thiel,11 E. J. Tonelli Manganote,11,e F. Torres Da Silva De Araujo,11 A. Vilela Pereira,11 S. Ahuja,12a C. A. Bernardes,12a T. R. Fernandez Perez Tomei,12a E. M. Gregores,12b P. G. Mercadante,12b S. F. Novaes,12a Sandra S. Padula,12a D. Romero Abad,12b J. C. Ruiz Vargas,12a A. Aleksandrov,13 R. Hadjiiska,13 P. Iaydjiev,13 M. Misheva,13 M. Rodozov,13 M. Shopova,13 G. Sultanov,13 A. Dimitrov,14 I. Glushkov,14 L. Litov,14 B. Pavlov,14 P. Petkov,14 W. Fang,15,g X. Gao,15,g L. Yuan,15 M. Ahmad,16 J. G. Bian,16 G. M. Chen,16 H. S. Chen,16 M. Chen,16 Y. Chen,16 C. H. Jiang,16 D. Leggat,16 H. Liao,16 Z. Liu,16 F. Romeo,16 S. M. Shaheen,16 A. Spiezia,16 J. Tao,16 C. Wang,16 Z. Wang,16 E. Yazgan,16 H. Zhang,16 S. Zhang,16 J. Zhao,16 Y. Ban,17 G. Chen,17 Q. Li,17 S. Liu,17 Y. Mao,17 S. J. Qian,17 D. Wang,17 Z. Xu,17 C. Avila,18 A. Cabrera,18 L. F. Chaparro Sierra,18 C. Florez,18 C. F. González Hernández,18 J. D. Ruiz Alvarez,18 B. Courbon,19 N. Godinovic,19 D. Lelas,19 I. Puljak,19 P. M. Ribeiro Cipriano,19 T. Sculac,19 Z. Antunovic,20 M. Kovac,20 V. Brigljevic,21 D. Ferencek,21 K. Kadija,21 B. Mesic,21 A. Starodumov,21,h T. Susa,21 M.W. Ather,22 A. Attikis,22 G. Mavromanolakis,22 J. Mousa,22 C. Nicolaou,22 F. Ptochos,22 P. A. Razis,22 H. Rykaczewski,22 M. Finger,23,i M. Finger Jr.,23,i E. Carrera Jarrin,24 A. A. Abdelalim,25,j,k Y. Mohammed,25,l E. Salama,25,m,n R. K. Dewanjee,26 M. Kadastik,26 L. Perrini,26 M. Raidal,26 A. Tiko,26 C. Veelken,26 P. Eerola,27 H. Kirschenmann,27 J. Pekkanen,27 M. Voutilainen,27 T. Järvinen,28 V. Karimäki,28 R. Kinnunen,28 T. Lampén,28 K. Lassila-Perini,28 S. Lehti,28 T. Lindén,28 P. Luukka,28 E. Tuominen,28 J. Tuominiemi,28 J. Talvitie,29 T. Tuuva,29 M. Besancon,30 F. Couderc,30 M. Dejardin,30 D. Denegri,30 J. L. Faure,30 F. Ferri,30 S. Ganjour,30 S. Ghosh,30 A. Givernaud,30 P. Gras,30 G. Hamel de Monchenault,30 P. Jarry,30 I. Kucher,30 C. Leloup,30 E. Locci,30 M. Machet,30 J. Malcles,30 G. Negro,30 J. Rander,30 A. Rosowsky,30 M. Ö. Sahin,30 M. Titov,30 A. Abdulsalam,31 C. Amendola,31 I. Antropov,31 S. Baffioni,31 F. Beaudette,31 P. Busson,31 L. Cadamuro,31 C. Charlot,31 R. Granier de Cassagnac,31 M. Jo,31 S. Lisniak,31 A. Lobanov,31 J. Martin Blanco,31 M. Nguyen,31 C. Ochando,31 G. Ortona,31 P. Paganini,31 P. Pigard,31 R. Salerno,31 J. B. Sauvan,31 Y. Sirois,31 A. G. Stahl Leiton,31 T. Strebler,31 Y. Yilmaz,31 A. Zabi,31 A. Zghiche,31 J.-L. Agram,32,o J. Andrea,32 D. Bloch,32 J.-M. Brom,32 M. Buttignol,32 E. C. Chabert,32 N. Chanon,32 C. Collard,32 E. Conte,32,o X. Coubez,32 J.-C. Fontaine,32,o D. Gelé,32 U. Goerlach,32 M. Jansová,32 A.-C. Le Bihan,32 N. Tonon,32 P. Van Hove,32 S. Gadrat,33 S. Beauceron,34 C. Bernet,34 G. Boudoul,34 R. Chierici,34 D. Contardo,34 P. Depasse,34 H. El Mamouni,34 J. Fay,34 L. Finco,34 S. Gascon,34 M. Gouzevitch,34 PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-7 https://doi.org/10.1016/S0550-3213(96)00581-0 http://arXiv.org/abs/1707.03767 G. Grenier,34 B. Ille,34 F. Lagarde,34 I. B. Laktineh,34 M. Lethuillier,34 L. Mirabito,34 A. L. Pequegnot,34 S. Perries,34 A. Popov,34,p V. Sordini,34 M. Vander Donckt,34 S. Viret,34 A. Khvedelidze,35,i Z. Tsamalaidze,36,i C. Autermann,37 L. Feld,37 M. K. Kiesel,37 K. Klein,37 M. Lipinski,37 M. Preuten,37 C. Schomakers,37 J. Schulz,37 V. Zhukov,37,p A. Albert,38 E. Dietz-Laursonn,38 D. Duchardt,38 M. Endres,38 M. Erdmann,38 S. Erdweg,38 T. Esch,38 R. Fischer,38 A. Güth,38 M. Hamer,38 T. Hebbeker,38 C. Heidemann,38 K. Hoepfner,38 S. Knutzen,38 M. Merschmeyer,38 A. Meyer,38 P. Millet,38 S. Mukherjee,38 T. Pook,38 M. Radziej,38 H. Reithler,38 M. Rieger,38 F. Scheuch,38 D. Teyssier,38 S. Thüer,38 G. Flügge,39 B. Kargoll,39 T. Kress,39 A. Künsken,39 T. Müller,39 A. Nehrkorn,39 A. Nowack,39 C. Pistone,39 O. Pooth,39 A. Stahl,39,q M. Aldaya Martin,40 T. Arndt,40 C. Asawatangtrakuldee,40 K. Beernaert,40 O. Behnke,40 U. Behrens,40 A. BermúdezMartínez,40 A. A. Bin Anuar,40 K. Borras,40,r V. Botta,40 A. Campbell,40 P. Connor,40 C. Contreras-Campana,40 F. Costanza,40 C. Diez Pardos,40 G. Eckerlin,40 D. Eckstein,40 T. Eichhorn,40 E. Eren,40 E. Gallo,40,s J. Garay Garcia,40 A. Geiser,40 A. Gizhko,40 J. M. Grados Luyando,40 A. Grohsjean,40 P. Gunnellini,40 M. Guthoff,40 A. Harb,40 J. Hauk,40 M. Hempel,40,t H. Jung,40 A. Kalogeropoulos,40 M. Kasemann,40 J. Keaveney,40 C. Kleinwort,40 I. Korol,40 D. Krücker,40 W. Lange,40 A. Lelek,40 T. Lenz,40 J. Leonard,40 K. Lipka,40 W. Lohmann,40,t R. Mankel,40 I.-A. Melzer-Pellmann,40 A. B. Meyer,40 G. Mittag,40 J. Mnich,40 A. Mussgiller,40 E. Ntomari,40 D. Pitzl,40 A. Raspereza,40 B. Roland,40 M. Savitskyi,40 P. Saxena,40 R. Shevchenko,40 S. Spannagel,40 N. Stefaniuk,40 G. P. Van Onsem,40 R. Walsh,40 Y. Wen,40 K. Wichmann,40 C. Wissing,40 O. Zenaiev,40 R. Aggleton,41 S. Bein,41 V. Blobel,41 M. Centis Vignali,41 T. Dreyer,41 E. Garutti,41 D. Gonzalez,41 J. Haller,41 A. Hinzmann,41 M. Hoffmann,41 A. Karavdina,41 R. Klanner,41 R. Kogler,41 N. Kovalchuk,41 S. Kurz,41 T. Lapsien,41 I. Marchesini,41 D. Marconi,41 M. Meyer,41 M. Niedziela,41 D. Nowatschin,41 F. Pantaleo,41,q T. Peiffer,41 A. Perieanu,41 C. Scharf,41 P. Schleper,41 A. Schmidt,41 S. Schumann,41 J. Schwandt,41 J. Sonneveld,41 H. Stadie,41 G. Steinbrück,41 F. M. Stober,41 M. Stöver,41 H. Tholen,41 D. Troendle,41 E. Usai,41 L. Vanelderen,41 A. Vanhoefer,41 B. Vormwald,41 M. Akbiyik,42 C. Barth,42 S. Baur,42 E. Butz,42 R. Caspart,42 T. Chwalek,42 F. Colombo,42 W. De Boer,42 A. Dierlamm,42 B. Freund,42 R. Friese,42 M. Giffels,42 D. Haitz,42 M. A. Harrendorf,42 F. Hartmann,42,q S. M. Heindl,42 U. Husemann,42 F. Kassel,42,q S. Kudella,42 H. Mildner,42 M. U. Mozer,42 Th. Müller,42 M. Plagge,42 G. Quast,42 K. Rabbertz,42 M. Schröder,42 I. Shvetsov,42 G. Sieber,42 H. J. Simonis,42 R. Ulrich,42 S. Wayand,42 M. Weber,42 T. Weiler,42 S. Williamson,42 C. Wöhrmann,42 R. Wolf,42 G. Anagnostou,43 G. Daskalakis,43 T. Geralis,43 V. A. Giakoumopoulou,43 A. Kyriakis,43 D. Loukas,43 I. Topsis-Giotis,43 G. Karathanasis,44 S. Kesisoglou,44 A. Panagiotou,44 N. Saoulidou,44 K. Kousouris,45 I. Evangelou,46 C. Foudas,46 P. Kokkas,46 S. Mallios,46 N. Manthos,46 I. Papadopoulos,46 E. Paradas,46 J. Strologas,46 F. A. Triantis,46 M. Csanad,47 N. Filipovic,47 G. Pasztor,47 O. Surányi,47 G. I. Veres,47,u G. Bencze,48 C. Hajdu,48 D. Horvath,48,v Á. Hunyadi,48 F. Sikler,48 V. Veszpremi,48 A. J. Zsigmond,48 N. Beni,49 S. Czellar,49 J. Karancsi,49,w A. Makovec,49 J. Molnar,49 Z. Szillasi,49 M. Bartók,50,u P. Raics,50 Z. L. Trocsanyi,50 B. Ujvari,50 S. Choudhury,51 J. R. Komaragiri,51 S. Bahinipati,52,x S. Bhowmik,52 P. Mal,52 K. Mandal,52 A. Nayak,52,y D. K. Sahoo,52,x N. Sahoo,52 S. K. Swain,52 S. Bansal,53 S. B. Beri,53 V. Bhatnagar,53 R. Chawla,53 N. Dhingra,53 A. K. Kalsi,53 A. Kaur,53 M. Kaur,53 S. Kaur,53 R. Kumar,53 P. Kumari,53 A. Mehta,53 J. B. Singh,53 G. Walia,53 Ashok Kumar,54 Aashaq Shah,54 A. Bhardwaj,54 S. Chauhan,54 B. C. Choudhary,54 R. B. Garg,54 S. Keshri,54 A. Kumar,54 S. Malhotra,54 M. Naimuddin,54 K. Ranjan,54 R. Sharma,54 R. Bhardwaj,55 R. Bhattacharya,55 S. Bhattacharya,55 U. Bhawandeep,55 S. Dey,55 S. Dutt,55 S. Dutta,55 S. Ghosh,55 N. Majumdar,55 A. Modak,55 K. Mondal,55 S. Mukhopadhyay,55 S. Nandan,55 A. Purohit,55 A. Roy,55 D. Roy,55 S. Roy Chowdhury,55 S. Sarkar,55 M. Sharan,55 S. Thakur,55 P. K. Behera,56 R. Chudasama,57 D. Dutta,57 V. Jha,57 V. Kumar,57 A. K. Mohanty,57,q P. K. Netrakanti,57 L. M. Pant,57 P. Shukla,57 A. Topkar,57 T. Aziz,58 S. Dugad,58 B. Mahakud,58 S. Mitra,58 G. B. Mohanty,58 N. Sur,58 B. Sutar,58 S. Banerjee,59 S. Bhattacharya,59 S. Chatterjee,59 P. Das,59 M. Guchait,59 Sa. Jain,59 S. Kumar,59 M. Maity,59,z G. Majumder,59 K. Mazumdar,59 T. Sarkar,59,z N. Wickramage,59,aa S. Chauhan,60 S. Dube,60 V. Hegde,60 A. Kapoor,60 K. Kothekar,60 S. Pandey,60 A. Rane,60 S. Sharma,60 S. Chenarani,61,bb E. Eskandari Tadavani,61 S. M. Etesami,61,bb M. Khakzad,61 M. Mohammadi Najafabadi,61 M. Naseri,61 S. Paktinat Mehdiabadi,61,cc F. Rezaei Hosseinabadi,61 B. Safarzadeh,61,dd M. Zeinali,61 M. Felcini,62 M. Grunewald,62 M. Abbrescia,63a,63b C. Calabria,63a,63b A. Colaleo,63a D. Creanza,63a,63c L. Cristella,63a,63b N. De Filippis,63a,63c M. De Palma,63a,63b F. Errico,63a,63b L. Fiore,63a G. Iaselli,63a,63c S. Lezki,63a,63b G. Maggi,63a,63c M. Maggi,63a G. Miniello,63a,63b S. My,63a,63b S. Nuzzo,63a,63b A. Pompili,63a,63b G. Pugliese,63a,63c R. Radogna,63a A. Ranieri,63a G. Selvaggi,63a,63b A. Sharma,63a L. Silvestris,63a,q R. Venditti,63a P. Verwilligen,63a G. Abbiendi,64a C. Battilana,64a,64b D. Bonacorsi,64a,64b L. Borgonovi,64a,64b S. Braibant-Giacomelli,64a,64b R. Campanini,64a,64b P. Capiluppi,64a,64b A. Castro,64a,64b F. R. Cavallo,64a S. S. Chhibra,64a G. Codispoti,64a,64b PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-8 M. Cuffiani,64a,64b G. M. Dallavalle,64a F. Fabbri,64a A. Fanfani,64a,64b D. Fasanella,64a,64b P. Giacomelli,64a C. Grandi,64a L. Guiducci,64a,64b S. Marcellini,64a G. Masetti,64a A. Montanari,64a F. L. Navarria,64a,64b A. Perrotta,64a A. M. Rossi,64a,64b T. Rovelli,64a,64b G. P. Siroli,64a,64b N. Tosi,64a S. Albergo,65a,65b S. Costa,65a,65b A. Di Mattia,65a F. Giordano,65a,65b R. Potenza,65a,65b A. Tricomi,65a,65b C. Tuve,65a,65b G. Barbagli,66a K. Chatterjee,66a,66b V. Ciulli,66a,66b C. Civinini,66a R. D’Alessandro,66a,66b E. Focardi,66a,66b P. Lenzi,66a,66b M. Meschini,66a S. Paoletti,66a L. Russo,66a,ee G. Sguazzoni,66a D. Strom,66a L. Viliani,66a,66b,q L. Benussi,67 S. Bianco,67 F. Fabbri,67 D. Piccolo,67 F. Primavera,67,q V. Calvelli,68a,68b F. Ferro,68a E. Robutti,68a S. Tosi,68a,68b A. Benaglia,69a L. Brianza,69a,69b F. Brivio,69a,69b V. Ciriolo,69a,69b M. E. Dinardo,69a,69b S. Fiorendi,69a,69b S. Gennai,69a A. Ghezzi,69a,69b P. Govoni,69a,69b M. Malberti,69a,69b S. Malvezzi,69a R. A. Manzoni,69a,69b D. Menasce,69a L. Moroni,69a M. Paganoni,69a,69b K. Pauwels,69a,69b D. Pedrini,69a S. Pigazzini,69a,69b,ff S. Ragazzi,69a,69b N. Redaelli,69a T. Tabarelli de Fatis,69a,69b S. Buontempo,70a N. Cavallo,70a,70c S. Di Guida,70a,70d,q F. Fabozzi,70a,70c F. Fienga,70a,70b A. O. M. Iorio,70a,70b W. A. Khan,70a L. Lista,70a S. Meola,70a,70d,q P. Paolucci,70a,q C. Sciacca,70a,70b F. Thyssen,70a P. Azzi,71a N. Bacchetta,71a L. Benato,71a,71b D. Bisello,71a,71b A. Boletti,71a,71b R. Carlin,71a,71b A. Carvalho Antunes De Oliveira,71a,71b P. Checchia,71a M. Dall’Osso,71a,71b P. De Castro Manzano,71a T. Dorigo,71a U. Dosselli,71a A. Gozzelino,71a S. Lacaprara,71a P. Lujan,71a M. Margoni,71a,71b A. T. Meneguzzo,71a,71b F. Montecassiano,71a N. Pozzobon,71a,71b P. Ronchese,71a,71b R. Rossin,71a,71b F. Simonetto,71a,71b E. Torassa,71a M. Zanetti,71a,71b P. Zotto,71a,71b G. Zumerle,71a,71b A. Braghieri,72a A. Magnani,72a P. Montagna,72a,72b S. P. Ratti,72a,72b V. Re,72a M. Ressegotti,72a,72b C. Riccardi,72a,72b P. Salvini,72a I. Vai,72a,72b P. Vitulo,72a,72b L. Alunni Solestizi,73a,73b M. Biasini,73a,73b G. M. Bilei,73a C. Cecchi,73a,73b D. Ciangottini,73a,73b L. Fanò,73a,73b P. Lariccia,73a,73b R. Leonardi,73a,73b E. Manoni,73a G. Mantovani,73a,73b V. Mariani,73a,73b M. Menichelli,73a A. Rossi,73a,73b A. Santocchia,73a,73b D. Spiga,73a K. Androsov,74a P. Azzurri,74a,q G. Bagliesi,74a T. Boccali,74a L. Borrello,74a R. Castaldi,74a M. A. Ciocci,74a,74b R. Dell’Orso,74a G. Fedi,74a L. Giannini,74a,74c A. Giassi,74a M. T. Grippo,74a,ee F. Ligabue,74a,74c T. Lomtadze,74a E. Manca,74a,74c G. Mandorli,74a,74c L. Martini,74a,74b A. Messineo,74a,74b F. Palla,74a A. Rizzi,74a,74b A. Savoy-Navarro,74a,gg P. Spagnolo,74a R. Tenchini,74a G. Tonelli,74a,74b A. Venturi,74a P. G. Verdini,74a L. Barone,75a,75b F. Cavallari,75a M. Cipriani,75a,75b N. Daci,75a D. Del Re,75a,75b,q E. Di Marco,75a,75b M. Diemoz,75a S. Gelli,75a,75b E. Longo,75a,75b F. Margaroli,75a,75b B. Marzocchi,75a,75b P. Meridiani,75a G. Organtini,75a,75b R. Paramatti,75a,75b F. Preiato,75a,75b S. Rahatlou,75a,75b C. Rovelli,75a F. Santanastasio,75a,75b N. Amapane,76a,76b R. Arcidiacono,76a,76c S. Argiro,76a,76b M. Arneodo,76a,76c N. Bartosik,76a R. Bellan,76a,76b C. Biino,76a N. Cartiglia,76a F. Cenna,76a,76b M. Costa,76a,76b R. Covarelli,76a,76b A. Degano,76a,76b N. Demaria,76a B. Kiani,76a,76b C. Mariotti,76a S. Maselli,76a E. Migliore,76a,76b V. Monaco,76a,76b E. Monteil,76a,76b M. Monteno,76a M.M. Obertino,76a,76b L. Pacher,76a,76b N. Pastrone,76a M. Pelliccioni,76a G. L. Pinna Angioni,76a,76b F. Ravera,76a,76b A. Romero,76a,76b M. Ruspa,76a,76c R. Sacchi,76a,76b K. Shchelina,76a,76b V. Sola,76a A. Solano,76a,76b A. Staiano,76a P. Traczyk,76a,76b S. Belforte,77a M. Casarsa,77a F. Cossutti,77a G. Della Ricca,77a,77b A. Zanetti,77a D. H. Kim,78 G. N. Kim,78 M. S. Kim,78 J. Lee,78 S. Lee,78 S. W. Lee,78 C. S. Moon,78 Y. D. Oh,78 S. Sekmen,78 D. C. Son,78 Y. C. Yang,78 A. Lee,79 H. Kim,80 D. H. Moon,80 G. Oh,80 J. A. Brochero Cifuentes,81 J. Goh,81 T. J. Kim,81 S. Cho,82 S. Choi,82 Y. Go,82 D. Gyun,82 S. Ha,82 B. Hong,82 Y. Jo,82 Y. Kim,82 K. Lee,82 K. S. Lee,82 S. Lee,82 J. Lim,82 S. K. Park,82 Y. Roh,82 J. Almond,83 J. Kim,83 J. S. Kim,83 H. Lee,83 K. Lee,83 K. Nam,83 S. B. Oh,83 B. C. Radburn-Smith,83 S. h. Seo,83 U. K. Yang,83 H. D. Yoo,83 G. B. Yu,83 M. Choi,84 H. Kim,84 J. H. Kim,84 J. S. H. Lee,84 I. C. Park,84 Y. Choi,85 C. Hwang,85 J. Lee,85 I. Yu,85 V. Dudenas,86 A. Juodagalvis,86 J. Vaitkus,86 I. Ahmed,87 Z. A. Ibrahim,87 M. A. B. Md Ali,87,hh F. Mohamad Idris,87,ii W. A. T. Wan Abdullah,87 M. N. Yusli,87 Z. Zolkapli,87 R Reyes-Almanza,88 G. Ramirez-Sanchez,88 M. C. Duran-Osuna,88 H. Castilla-Valdez,88 E. De La Cruz-Burelo,88 I. Heredia-De La Cruz,88,jj R. I. Rabadan-Trejo,88 R. Lopez-Fernandez,88 J. Mejia Guisao,88 A. Sanchez-Hernandez,88 S. Carrillo Moreno,89 C. Oropeza Barrera,89 F. Vazquez Valencia,89 I. Pedraza,90 H. A. Salazar Ibarguen,90 C. Uribe Estrada,90 A. Morelos Pineda,91 D. Krofcheck,92 P. H. Butler,93 A. Ahmad,94 M. Ahmad,94 Q. Hassan,94 H. R. Hoorani,94 A. Saddique,94 M. A. Shah,94 M. Shoaib,94 M. Waqas,94 H. Bialkowska,95 M. Bluj,95 B. Boimska,95 T. Frueboes,95 M. Górski,95 M. Kazana,95 K. Nawrocki,95 M. Szleper,95 P. Zalewski,95 K. Bunkowski,96 A. Byszuk,96,kk K. Doroba,96 A. Kalinowski,96 M. Konecki,96 J. Krolikowski,96 M. Misiura,96 M. Olszewski,96 A. Pyskir,96 M. Walczak,96 P. Bargassa,97 C. Beirão Da Cruz E Silva,97 A. Di Francesco,97 P. Faccioli,97 B. Galinhas,97 M. Gallinaro,97 J. Hollar,97 N. Leonardo,97 L. Lloret Iglesias,97 M. V. Nemallapudi,97 J. Seixas,97 G. Strong,97 O. Toldaiev,97 D. Vadruccio,97 J. Varela,97 S. Afanasiev,98 P. Bunin,98 M. Gavrilenko,98 I. Golutvin,98 I. Gorbunov,98 A. Kamenev,98 V. Karjavin,98 A. Lanev,98 A. Malakhov,98 V. Matveev,98,ll,mm V. Palichik,98 V. Perelygin,98 S. Shmatov,98 S. Shulha,98 N. Skatchkov,98 V. Smirnov,98 N. Voytishin,98 PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-9 A. Zarubin,98 Y. Ivanov,99 V. Kim,99,nn E. Kuznetsova,99,oo P. Levchenko,99 V. Murzin,99 V. Oreshkin,99 I. Smirnov,99 V. Sulimov,99 L. Uvarov,99 S. Vavilov,99 A. Vorobyev,99 Yu. Andreev,100 A. Dermenev,100 S. Gninenko,100 N. Golubev,100 A. Karneyeu,100 M. Kirsanov,100 N. Krasnikov,100 A. Pashenkov,100 D. Tlisov,100 A. Toropin,100 V. Epshteyn,101 V. Gavrilov,101 N. Lychkovskaya,101 V. Popov,101 I. Pozdnyakov,101 G. Safronov,101 A. Spiridonov,101 A. Stepennov,101 M. Toms,101 E. Vlasov,101 A. Zhokin,101 T. Aushev,102 A. Bylinkin,102,mm M. Chadeeva,103,pp O. Markin,103 P. Parygin,103 D. Philippov,103 S. Polikarpov,103 V. Rusinov,103 V. Andreev,104 M. Azarkin,104,mm I. Dremin,104,mm M. Kirakosyan,104,mm A. Terkulov,104 A. Baskakov,105 A. Belyaev,105 E. Boos,105 A. Demiyanov,105 A. Ershov,105 A. Gribushin,105 O. Kodolova,105 V. Korotkikh,105 I. Lokhtin,105 I. Miagkov,105 S. Obraztsov,105 S. Petrushanko,105 V. Savrin,105 A. Snigirev,105 I. Vardanyan,105 V. Blinov,106,qq Y. Skovpen,106,qq D. Shtol,106,qq I. Azhgirey,107 I. Bayshev,107 S. Bitioukov,107 D. Elumakhov,107 V. Kachanov,107 A. Kalinin,107 D. Konstantinov,107 P. Mandrik,107 V. Petrov,107 R. Ryutin,107 A. Sobol,107 S. Troshin,107 N. Tyurin,107 A. Uzunian,107 A. Volkov,107 P. Adzic,108,rr P. Cirkovic,108 D. Devetak,108 M. Dordevic,108 J. Milosevic,108 V. Rekovic,108 J. Alcaraz Maestre,109 M. Barrio Luna,109 M. Cerrada,109 N. Colino,109 B. De La Cruz,109 A. Delgado Peris,109 A. Escalante Del Valle,109 C. Fernandez Bedoya,109 J. P. Fernández Ramos,109 J. Flix,109 M. C. Fouz,109 O. Gonzalez Lopez,109 S. Goy Lopez,109 J. M. Hernandez,109 M. I. Josa,109 D. Moran,109 A. Pérez-Calero Yzquierdo,109 J. Puerta Pelayo,109 A. Quintario Olmeda,109 I. Redondo,109 L. Romero,109 M. S. Soares,109 A. Álvarez Fernández,109 J. F. de Trocóniz,110 M. Missiroli,110 J. Cuevas,111 C. Erice,111 J. Fernandez Menendez,111 I. Gonzalez Caballero,111 J. R. González Fernández,111 E. Palencia Cortezon,111 S. Sanchez Cruz,111 P. Vischia,111 J. M. Vizan Garcia,111 I. J. Cabrillo,112 A. Calderon,112 B. Chazin Quero,112 E. Curras,112 J. Duarte Campderros,112 M. Fernandez,112 J. Garcia-Ferrero,112 G. Gomez,112 A. Lopez Virto,112 J. Marco,112 C. Martinez Rivero,112 P. Martinez Ruiz del Arbol,112 F. Matorras,112 J. Piedra Gomez,112 T. Rodrigo,112 A. Ruiz-Jimeno,112 L. Scodellaro,112 N. Trevisani,112 I. Vila,112 R. Vilar Cortabitarte,112 D. Abbaneo,113 B. Akgun,113 E. Auffray,113 P. Baillon,113 A. H. Ball,113 D. Barney,113 M. Bianco,113 P. Bloch,113 A. Bocci,113 C. Botta,113 T. Camporesi,113 R. Castello,113 M. Cepeda,113 G. Cerminara,113 E. Chapon,113 Y. Chen,113 D. d’Enterria,113 A. Dabrowski,113 V. Daponte,113 A. David,113 M. De Gruttola,113 A. De Roeck,113 N. Deelen,113 M. Dobson,113 T. du Pree,113 M. Dünser,113 N. Dupont,113 A. Elliott-Peisert,113 P. Everaerts,113 F. Fallavollita,113 G. Franzoni,113 J. Fulcher,113 W. Funk,113 D. Gigi,113 A. Gilbert,113 K. Gill,113 F. Glege,113 D. Gulhan,113 P. Harris,113 J. Hegeman,113 V. Innocente,113 A. Jafari,113 P. Janot,113 O. Karacheban,113,t J. Kieseler,113 V. Knünz,113 A. Kornmayer,113 M. J. Kortelainen,113 M. Krammer,113,b C. Lange,113 P. Lecoq,113 C. Lourenço,113 M. T. Lucchini,113 L. Malgeri,113 M. Mannelli,113 A. Martelli,113 F. Meijers,113 J. A. Merlin,113 S. Mersi,113 E. Meschi,113 P. Milenovic,113,ss F. Moortgat,113 M. Mulders,113 H. Neugebauer,113 J. Ngadiuba,113 S. Orfanelli,113 L. Orsini,113 L. Pape,113 E. Perez,113 M. Peruzzi,113 A. Petrilli,113 G. Petrucciani,113 A. Pfeiffer,113 M. Pierini,113 D. Rabady,113 A. Racz,113 T. Reis,113 G. Rolandi,113,tt M. Rovere,113 H. Sakulin,113 C. Schäfer,113 C. Schwick,113 M. Seidel,113 M. Selvaggi,113 A. Sharma,113 P. Silva,113 P. Sphicas,113,uu A. Stakia,113 J. Steggemann,113 M. Stoye,113 M. Tosi,113 D. Treille,113 A. Triossi,113 A. Tsirou,113 V. Veckalns,113,vv M. Verweij,113 W. D. Zeuner,113 W. Bertl,114,a L. Caminada,114,ww K. Deiters,114 W. Erdmann,114 R. Horisberger,114 Q. Ingram,114 H. C. Kaestli,114 D. Kotlinski,114 U. Langenegger,114 T. Rohe,114 S. A. Wiederkehr,114 M. Backhaus,115 L. Bäni,115 P. Berger,115 L. Bianchini,115 B. Casal,115 G. Dissertori,115 M. Dittmar,115 M. Donegà,115 C. Dorfer,115 C. Grab,115 C. Heidegger,115 D. Hits,115 J. Hoss,115 G. Kasieczka,115 T. Klijnsma,115 W. Lustermann,115 B. Mangano,115 M. Marionneau,115 M. T. Meinhard,115 D. Meister,115 F. Micheli,115 P. Musella,115 F. Nessi-Tedaldi,115 F. Pandolfi,115 J. Pata,115 F. Pauss,115 G. Perrin,115 L. Perrozzi,115 M. Quittnat,115 M. Reichmann,115 D. A. Sanz Becerra,115 M. Schönenberger,115 L. Shchutska,115 V. R. Tavolaro,115 K. Theofilatos,115 M. L. Vesterbacka Olsson,115 R. Wallny,115 D. H. Zhu,115 T. K. Aarrestad,116 C. Amsler,116,xx M. F. Canelli,116 A. De Cosa,116 R. Del Burgo,116 S. Donato,116 C. Galloni,116 T. Hreus,116 B. Kilminster,116 D. Pinna,116 G. Rauco,116 P. Robmann,116 D. Salerno,116 K. Schweiger,116 C. Seitz,116 Y. Takahashi,116 A. Zucchetta,116 V. Candelise,117 T. H. Doan,117 Sh. Jain,117 R. Khurana,117 C. M. Kuo,117 W. Lin,117 A. Pozdnyakov,117 S. S. Yu,117 Arun Kumar,118 P. Chang,118 Y. Chao,118 K. F. Chen,118 P. H. Chen,118 F. Fiori,118 W.-S. Hou,118 Y. Hsiung,118 Y. F. Liu,118 R.-S. Lu,118 E. Paganis,118 A. Psallidas,118 A. Steen,118 J. f. Tsai,118 B. Asavapibhop,119 K. Kovitanggoon,119 G. Singh,119 N. Srimanobhas,119 F. Boran,120 S. Cerci,120,yy S. Damarseckin,120 Z. S. Demiroglu,120 C. Dozen,120 I. Dumanoglu,120 S. Girgis,120 G. Gokbulut,120 Y. Guler,120 I. Hos,120,zz E. E. Kangal,120,aaa O. Kara,120 A. Kayis Topaksu,120 U. Kiminsu,120 M. Oglakci,120 G. Onengut,120,bbb K. Ozdemir,120,ccc D. Sunar Cerci,120,yy B. Tali,120,yy S. Turkcapar,120 I. S. Zorbakir,120 C. Zorbilmez,120 B. Bilin,121 G. Karapinar,121,ddd K. Ocalan,121,eee M. Yalvac,121 M. Zeyrek,121 E. Gülmez,122 M. Kaya,122,fff O. Kaya,122,ggg S. Tekten,122 E. A. Yetkin,122,hhh M. N. Agaras,123 PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-10 S. Atay,123 A. Cakir,123 K. Cankocak,123 B. Grynyov,124 L. Levchuk,125 F. Ball,126 L. Beck,126 J. J. Brooke,126 D. Burns,126 E. Clement,126 D. Cussans,126 O. Davignon,126 H. Flacher,126 J. Goldstein,126 G. P. Heath,126 H. F. Heath,126 J. Jacob,126 L. Kreczko,126 D. M. Newbold,126,iii S. Paramesvaran,126 T. Sakuma,126 S. Seif El Nasr-storey,126 D. Smith,126 V. J. Smith,126 A. Belyaev,127,jjj C. Brew,127 R. M. Brown,127 L. Calligaris,127 D. Cieri,127 D. J. A. Cockerill,127 J. A. Coughlan,127 K. Harder,127 S. Harper,127 E. Olaiya,127 D. Petyt,127 C. H. Shepherd-Themistocleous,127 A. Thea,127 I. R. Tomalin,127 T. Williams,127 G. Auzinger,128 R. Bainbridge,128 J. Borg,128 S. Breeze,128 O. Buchmuller,128 A. Bundock,128 S. Casasso,128 M. Citron,128 D. Colling,128 L. Corpe,128 P. Dauncey,128 G. Davies,128 A. De Wit,128 M. Della Negra,128 R. Di Maria,128 A. Elwood,128 Y. Haddad,128 G. Hall,128 G. Iles,128 T. James,128 R. Lane,128 C. Laner,128 L. Lyons,128 A.-M. Magnan,128 S. Malik,128 L. Mastrolorenzo,128 T. Matsushita,128 J. Nash,128 A. Nikitenko,128,h V. Palladino,128 M. Pesaresi,128 D. M. Raymond,128 A. Richards,128 A. Rose,128 E. Scott,128 C. Seez,128 A. Shtipliyski,128 S. Summers,128 A. Tapper,128 K. Uchida,128 M. Vazquez Acosta,128,kkk T. Virdee,128,q N. Wardle,128 D. Winterbottom,128 J. Wright,128 S. C. Zenz,128 J. E. Cole,129 P. R. Hobson,129 A. Khan,129 P. Kyberd,129 I. D. Reid,129 P. Symonds,129 L. Teodorescu,129 M. Turner,129 S. Zahid,129 A. Borzou,130 K. Call,130 J. Dittmann,130 K. Hatakeyama,130 H. Liu,130 N. Pastika,130 C. Smith,130 R. Bartek,131 A. Dominguez,131 A. Buccilli,132 S. I. Cooper,132 C. Henderson,132 P. Rumerio,132 C. West,132 D. Arcaro,133 A. Avetisyan,133 T. Bose,133 D. Gastler,133 D. Rankin,133 C. Richardson,133 J. Rohlf,133 L. Sulak,133 D. Zou,133 G. Benelli,134 D. Cutts,134 A. Garabedian,134 M. Hadley,134 J. Hakala,134 U. Heintz,134 J. M. Hogan,134 K. H. M. Kwok,134 E. Laird,134 G. Landsberg,134 J. Lee,134 Z. Mao,134 M. Narain,134 J. Pazzini,134 S. Piperov,134 S. Sagir,134 R. Syarif,134 D. Yu,134 R. Band,135 C. Brainerd,135 D. Burns,135 M. Calderon De La Barca Sanchez,135 M. Chertok,135 J. Conway,135 R. Conway,135 P. T. Cox,135 R. Erbacher,135 C. Flores,135 G. Funk,135 M. Gardner,135 W. Ko,135 R. Lander,135 C. Mclean,135 M. Mulhearn,135 D. Pellett,135 J. Pilot,135 S. Shalhout,135 M. Shi,135 J. Smith,135 D. Stolp,135 K. Tos,135 M. Tripathi,135 Z. Wang,135 M. Bachtis,136 C. Bravo,136 R. Cousins,136 A. Dasgupta,136 A. Florent,136 J. Hauser,136 M. Ignatenko,136 N. Mccoll,136 S. Regnard,136 D. Saltzberg,136 C. Schnaible,136 V. Valuev,136 E. Bouvier,137 K. Burt,137 R. Clare,137 J. Ellison,137 J. W. Gary,137 S. M. A. Ghiasi Shirazi,137 G. Hanson,137 J. Heilman,137 E. Kennedy,137 F. Lacroix,137 O. R. Long,137 M. Olmedo Negrete,137 M. I. Paneva,137 W. Si,137 L. Wang,137 H. Wei,137 S. Wimpenny,137 B. R. Yates,137 J. G. Branson,138 S. Cittolin,138 M. Derdzinski,138 R. Gerosa,138 D. Gilbert,138 B. Hashemi,138 A. Holzner,138 D. Klein,138 G. Kole,138 V. Krutelyov,138 J. Letts,138 I. Macneill,138 M. Masciovecchio,138 D. Olivito,138 S. Padhi,138 M. Pieri,138 M. Sani,138 V. Sharma,138 S. Simon,138 M. Tadel,138 A. Vartak,138 S. Wasserbaech,138,lll J. Wood,138 F. Würthwein,138 A. Yagil,138 G. Zevi Della Porta,138 N. Amin,139 R. Bhandari,139 J. Bradmiller-Feld,139 C. Campagnari,139 A. Dishaw,139 V. Dutta,139 M. Franco Sevilla,139 C. George,139 F. Golf,139 L. Gouskos,139 J. Gran,139 R. Heller,139 J. Incandela,139 S. D. Mullin,139 A. Ovcharova,139 H. Qu,139 J. Richman,139 D. Stuart,139 I. Suarez,139 J. Yoo,139 D. Anderson,140 J. Bendavid,140 A. Bornheim,140 J. M. Lawhorn,140 H. B. Newman,140 T. Nguyen,140 C. Pena,140 M. Spiropulu,140 J. R. Vlimant,140 S. Xie,140 Z. Zhang,140 R. Y. Zhu,140 M. B. Andrews,141 T. Ferguson,141 T. Mudholkar,141 M. Paulini,141 J. Russ,141 M. Sun,141 H. Vogel,141 I. Vorobiev,141 M. Weinberg,141 J. P. Cumalat,142 W. T. Ford,142 F. Jensen,142 A. Johnson,142 M. Krohn,142 S. Leontsinis,142 T. Mulholland,142 K. Stenson,142 S. R. Wagner,142 J. Alexander,143 J. Chaves,143 J. Chu,143 S. Dittmer,143 K. Mcdermott,143 N. Mirman,143 J. R. Patterson,143 D. Quach,143 A. Rinkevicius,143 A. Ryd,143 L. Skinnari,143 L. Soffi,143 S. M. Tan,143 Z. Tao,143 J. Thom,143 J. Tucker,143 P. Wittich,143 M. Zientek,143 S. Abdullin,144 M. Albrow,144 M. Alyari,144 G. Apollinari,144 A. Apresyan,144 A. Apyan,144 S. Banerjee,144 L. A. T. Bauerdick,144 A. Beretvas,144 J. Berryhill,144 P. C. Bhat,144 G. Bolla,144,a K. Burkett,144 J. N. Butler,144 A. Canepa,144 G. B. Cerati,144 H.W. K. Cheung,144 F. Chlebana,144 M. Cremonesi,144 J. Duarte,144 V. D. Elvira,144 J. Freeman,144 Z. Gecse,144 E. Gottschalk,144 L. Gray,144 D. Green,144 S. Grünendahl,144 O. Gutsche,144 R. M. Harris,144 S. Hasegawa,144 J. Hirschauer,144 Z. Hu,144 B. Jayatilaka,144 S. Jindariani,144 M. Johnson,144 U. Joshi,144 B. Klima,144 B. Kreis,144 S. Lammel,144 D. Lincoln,144 R. Lipton,144 M. Liu,144 T. Liu,144 R. Lopes De Sá,144 J. Lykken,144 K. Maeshima,144 N. Magini,144 J. M. Marraffino,144 D. Mason,144 P. McBride,144 P. Merkel,144 S. Mrenna,144 S. Nahn,144 V. O’Dell,144 K. Pedro,144 O. Prokofyev,144 G. Rakness,144 L. Ristori,144 B. Schneider,144 E. Sexton-Kennedy,144 A. Soha,144 W. J. Spalding,144 L. Spiegel,144 S. Stoynev,144 J. Strait,144 N. Strobbe,144 L. Taylor,144 S. Tkaczyk,144 N. V. Tran,144 L. Uplegger,144 E. W. Vaandering,144 C. Vernieri,144 M. Verzocchi,144 R. Vidal,144 M. Wang,144 H. A. Weber,144 A. Whitbeck,144 D. Acosta,145 P. Avery,145 P. Bortignon,145 D. Bourilkov,145 A. Brinkerhoff,145 A. Carnes,145 M. Carver,145 D. Curry,145 R. D. Field,145 I. K. Furic,145 S. V. Gleyzer,145 B. M. Joshi,145 J. Konigsberg,145 A. Korytov,145 K. Kotov,145 P. Ma,145 K. Matchev,145 H. Mei,145 G. Mitselmakher,145 D. Rank,145 K. Shi,145 D. Sperka,145 N. Terentyev,145 L. Thomas,145 J. Wang,145 S. Wang,145 J. Yelton,145 Y. R. Joshi,146 S. Linn,146 P. Markowitz,146 PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-11 J. L. Rodriguez,146 A. Ackert,147 T. Adams,147 A. Askew,147 S. Hagopian,147 V. Hagopian,147 K. F. Johnson,147 T. Kolberg,147 G. Martinez,147 T. Perry,147 H. Prosper,147 A. Saha,147 A. Santra,147 V. Sharma,147 R. Yohay,147 M.M. Baarmand,148 V. Bhopatkar,148 S. Colafranceschi,148 M. Hohlmann,148 D. Noonan,148 T. Roy,148 F. Yumiceva,148 M. R. Adams,149 L. Apanasevich,149 D. Berry,149 R. R. Betts,149 R. Cavanaugh,149 X. Chen,149 O. Evdokimov,149 C. E. Gerber,149 D. A. Hangal,149 D. J. Hofman,149 K. Jung,149 J. Kamin,149 I. D. Sandoval Gonzalez,149 M. B. Tonjes,149 H. Trauger,149 N. Varelas,149 H. Wang,149 Z. Wu,149 J. Zhang,149 B. Bilki,150,mmm W. Clarida,150 K. Dilsiz,150,nnn S. Durgut,150 R. P. Gandrajula,150 M. Haytmyradov,150 V. Khristenko,150 J.-P. Merlo,150 H. Mermerkaya,150,ooo A. Mestvirishvili,150 A. Moeller,150 J. Nachtman,150 H. Ogul,150,ppp Y. Onel,150 F. Ozok,150,qqq A. Penzo,150 C. Snyder,150 E. Tiras,150 J. Wetzel,150 K. Yi,150 B. Blumenfeld,151 A. Cocoros,151 N. Eminizer,151 D. Fehling,151 L. Feng,151 A. V. Gritsan,151 P. Maksimovic,151 J. Roskes,151 U. Sarica,151 M. Swartz,151 M. Xiao,151 C. You,151 A. Al-bataineh,152 P. Baringer,152 A. Bean,152 S. Boren,152 J. Bowen,152 J. Castle,152 S. Khalil,152 A. Kropivnitskaya,152 D. Majumder,152 W. Mcbrayer,152 M. Murray,152 C. Royon,152 S. Sanders,152 E. Schmitz,152 J. D. Tapia Takaki,152 Q. Wang,152 A. Ivanov,153 K. Kaadze,153 Y. Maravin,153 A. Mohammadi,153 L. K. Saini,153 N. Skhirtladze,153 S. Toda,153 F. Rebassoo,154 D. Wright,154 C. Anelli,155 A. Baden,155 O. Baron,155 A. Belloni,155 B. Calvert,155 S. C. Eno,155 Y. Feng,155 C. Ferraioli,155 N. J. Hadley,155 S. Jabeen,155 G. Y. Jeng,155 R. G. Kellogg,155 J. Kunkle,155 A. C. Mignerey,155 F. Ricci-Tam,155 Y. H. Shin,155 A. Skuja,155 S. C. Tonwar,155 D. Abercrombie,156 B. Allen,156 V. Azzolini,156 R. Barbieri,156 A. Baty,156 R. Bi,156 S. Brandt,156 W. Busza,156 I. A. Cali,156 M. D’Alfonso,156 Z. Demiragli,156 G. Gomez Ceballos,156 M. Goncharov,156 D. Hsu,156 M. Hu,156 Y. Iiyama,156 G. M. Innocenti,156 M. Klute,156 D. Kovalskyi,156 Y. S. Lai,156 Y.-J. Lee,156 A. Levin,156 P. D. Luckey,156 B. Maier,156 A. C. Marini,156 C. Mcginn,156 C. Mironov,156 S. Narayanan,156 X. Niu,156 C. Paus,156 C. Roland,156 G. Roland,156 J. Salfeld-Nebgen,156 G. S. F. Stephans,156 K. Tatar,156 D. Velicanu,156 J. Wang,156 T. W. Wang,156 B. Wyslouch,156 A. C. Benvenuti,157 R. M. Chatterjee,157 A. Evans,157 P. Hansen,157 J. Hiltbrand,157 S. Kalafut,157 Y. Kubota,157 Z. Lesko,157 J. Mans,157 S. Nourbakhsh,157 N. Ruckstuhl,157 R. Rusack,157 J. Turkewitz,157 M. A. Wadud,157 J. G. Acosta,158 S. Oliveros,158 E. Avdeeva,159 K. Bloom,159 D. R. Claes,159 C. Fangmeier,159 R. Gonzalez Suarez,159 R. Kamalieddin,159 I. Kravchenko,159 J. Monroy,159 J. E. Siado,159 G. R. Snow,159 B. Stieger,159 J. Dolen,160 A. Godshalk,160 C. Harrington,160 I. Iashvili,160 D. Nguyen,160 A. Parker,160 S. Rappoccio,160 B. Roozbahani,160 G. Alverson,161 E. Barberis,161 A. Hortiangtham,161 A. Massironi,161 D. M. Morse,161 T. Orimoto,161 R. Teixeira De Lima,161 D. Trocino,161 D. Wood,161 S. Bhattacharya,162 O. Charaf,162 K. A. Hahn,162 N. Mucia,162 N. Odell,162 B. Pollack,162 M. H. Schmitt,162 K. Sung,162 M. Trovato,162 M. Velasco,162 N. Dev,163 M. Hildreth,163 K. Hurtado Anampa,163 C. Jessop,163 D. J. Karmgard,163 N. Kellams,163 K. Lannon,163 N. Loukas,163 N. Marinelli,163 F. Meng,163 C. Mueller,163 Y. Musienko,163,ll M. Planer,163 A. Reinsvold,163 R. Ruchti,163 G. Smith,163 S. Taroni,163 M. Wayne,163 M. Wolf,163 A. Woodard,163 J. Alimena,164 L. Antonelli,164 B. Bylsma,164 L. S. Durkin,164 S. Flowers,164 B. Francis,164 A. Hart,164 C. Hill,164 W. Ji,164 B. Liu,164 W. Luo,164 D. Puigh,164 B. L. Winer,164 H.W. Wulsin,164 S. Cooperstein,165 O. Driga,165 P. Elmer,165 J. Hardenbrook,165 P. Hebda,165 S. Higginbotham,165 D. Lange,165 J. Luo,165 D. Marlow,165 K. Mei,165 I. Ojalvo,165 J. Olsen,165 C. Palmer,165 P. Piroué,165 D. Stickland,165 C. Tully,165 S. Malik,166 S. Norberg,166 A. Barker,167 V. E. Barnes,167 S. Das,167 S. Folgueras,167 L. Gutay,167 M. K. Jha,167 M. Jones,167 A.W. Jung,167 A. Khatiwada,167 D. H. Miller,167 N. Neumeister,167 C. C. Peng,167 H. Qiu,167 J. F. Schulte,167 J. Sun,167 F. Wang,167 W. Xie,167 T. Cheng,168 N. Parashar,168 J. Stupak,168 A. Adair,169 Z. Chen,169 K. M. Ecklund,169 S. Freed,169 F. J. M. Geurts,169 M. Guilbaud,169 M. Kilpatrick,169 W. Li,169 B. Michlin,169 M. Northup,169 B. P. Padley,169 J. Roberts,169 J. Rorie,169 W. Shi,169 Z. Tu,169 J. Zabel,169 A. Zhang,169 A. Bodek,170 P. de Barbaro,170 R. Demina,170 Y. t. Duh,170 T. Ferbel,170 M. Galanti,170 A. Garcia-Bellido,170 J. Han,170 O. Hindrichs,170 A. Khukhunaishvili,170 K. H. Lo,170 P. Tan,170 M. Verzetti,170 R. Ciesielski,171 K. Goulianos,171 C. Mesropian,171 A. Agapitos,172 J. P. Chou,172 Y. Gershtein,172 T. A. Gómez Espinosa,172 E. Halkiadakis,172 M. Heindl,172 E. Hughes,172 S. Kaplan,172 R. Kunnawalkam Elayavalli,172 S. Kyriacou,172 A. Lath,172 R. Montalvo,172 K. Nash,172 M. Osherson,172 H. Saka,172 S. Salur,172 S. Schnetzer,172 D. Sheffield,172 S. Somalwar,172 R. Stone,172 S. Thomas,172 P. Thomassen,172 M. Walker,172 A. G. Delannoy,173 M. Foerster,173 J. Heideman,173 G. Riley,173 K. Rose,173 S. Spanier,173 K. Thapa,173 O. Bouhali,174,rrr A. Castaneda Hernandez,174,rrr A. Celik,174 M. Dalchenko,174 M. De Mattia,174 A. Delgado,174 S. Dildick,174 R. Eusebi,174 J. Gilmore,174 T. Huang,174 T. Kamon,174,sss R. Mueller,174 Y. Pakhotin,174 R. Patel,174 A. Perloff,174 L. Perniè,174 D. Rathjens,174 A. Safonov,174 A. Tatarinov,174 K. A. Ulmer,174 N. Akchurin,175 J. Damgov,175 F. De Guio,175 P. R. Dudero,175 J. Faulkner,175 E. Gurpinar,175 S. Kunori,175 K. Lamichhane,175 S. W. Lee,175 T. Libeiro,175 T. Mengke,175 S. Muthumuni,175 T. Peltola,175 S. Undleeb,175 I. Volobouev,175 Z. Wang,175 S. Greene,176 A. Gurrola,176 PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-12 R. Janjam,176 W. Johns,176 C. Maguire,176 A. Melo,176 H. Ni,176 K. Padeken,176 P. Sheldon,176 S. Tuo,176 J. Velkovska,176 Q. Xu,176 M.W. Arenton,177 P. Barria,177 B. Cox,177 R. Hirosky,177 M. Joyce,177 A. Ledovskoy,177 H. Li,177 C. Neu,177 T. Sinthuprasith,177 Y. Wang,177 E. Wolfe,177 F. Xia,177 R. Harr,178 P. E. Karchin,178 N. Poudyal,178 J. Sturdy,178 P. Thapa,178 S. Zaleski,178 M. Brodski,179 J. Buchanan,179 C. Caillol,179 S. Dasu,179 L. Dodd,179 S. Duric,179 B. Gomber,179 M. Grothe,179 M. Herndon,179 A. Hervé,179 U. Hussain,179 P. Klabbers,179 A. Lanaro,179 A. Levine,179 K. Long,179 R. Loveless,179 G. Polese,179 T. Ruggles,179 A. Savin,179 N. Smith,179 W. H. Smith,179 D. Taylor,179 and N. Woods179 (CMS Collaboration) 1Yerevan Physics Institute, Yerevan, Armenia 2Institut für Hochenergiephysik, Wien, Austria 3Institute for Nuclear Problems, Minsk, Belarus 4Universiteit Antwerpen, Antwerpen, Belgium 5Vrije Universiteit Brussel, Brussel, Belgium 6Université Libre de Bruxelles, Bruxelles, Belgium 7Ghent University, Ghent, Belgium 8Université Catholique de Louvain, Louvain-la-Neuve, Belgium 9Université de Mons, Mons, Belgium 10Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil 11Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil 12aUniversidade Estadual Paulista, São Paulo, Brazil 12bUniversidade Federal do ABC, São Paulo, Brazil 13Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria 14University of Sofia, Sofia, Bulgaria 15Beihang University, Beijing, China 16Institute of High Energy Physics, Beijing, China 17State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China 18Universidad de Los Andes, Bogota, Colombia 19University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia 20University of Split, Faculty of Science, Split, Croatia 21Institute Rudjer Boskovic, Zagreb, Croatia 22University of Cyprus, Nicosia, Cyprus 23Charles University, Prague, Czech Republic 24Universidad San Francisco de Quito, Quito, Ecuador 25Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt 26National Institute of Chemical Physics and Biophysics, Tallinn, Estonia 27Department of Physics, University of Helsinki, Helsinki, Finland 28Helsinki Institute of Physics, Helsinki, Finland 29Lappeenranta University of Technology, Lappeenranta, Finland 30IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France 31Laboratoire Leprince-Ringuet, Ecole polytechnique, CNRS/IN2P3, Université Paris-Saclay, Palaiseau, France 32Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France 33Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France 34Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucléaire de Lyon, Villeurbanne, France 35Georgian Technical University, Tbilisi, Georgia 36Tbilisi State University, Tbilisi, Georgia 37RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany 38RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany 39RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany 40Deutsches Elektronen-Synchrotron, Hamburg, Germany 41University of Hamburg, Hamburg, Germany 42Institut für Experimentelle Kernphysik, Karlsruhe, Germany 43Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece 44National and Kapodistrian University of Athens, Athens, Greece 45National Technical University of Athens, Athens, Greece 46University of Ioánnina, Ioánnina, Greece 47MTA-ELTE Lendület CMS Particle and Nuclear Physics Group, Eötvös Loránd University, Budapest, Hungary PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-13 48Wigner Research Centre for Physics, Budapest, Hungary 49Institute of Nuclear Research ATOMKI, Debrecen, Hungary 50Institute of Physics, University of Debrecen, Debrecen, Hungary 51Indian Institute of Science (IISc), Bangalore, India 52National Institute of Science Education and Research, Bhubaneswar, India 53Panjab University, Chandigarh, India 54University of Delhi, Delhi, India 55Saha Institute of Nuclear Physics, HBNI, Kolkata,India 56Indian Institute of Technology Madras, Madras, India 57Bhabha Atomic Research Centre, Mumbai, India 58Tata Institute of Fundamental Research-A, Mumbai, India 59Tata Institute of Fundamental Research-B, Mumbai, India 60Indian Institute of Science Education and Research (IISER), Pune, India 61Institute for Research in Fundamental Sciences (IPM), Tehran, Iran 62University College Dublin, Dublin, Ireland 63aINFN Sezione di Bari, Bari, Italy 63bUniversità di Bari, Bari, Italy 63cPolitecnico di Bari, Bari, Italy 64aINFN Sezione di Bologna, Bologna, Italy 64bUniversità di Bologna, Bologna, Italy 65aINFN Sezione di Catania, Catania, Italy 65bUniversità di Catania, Catania, Italy 66aINFN Sezione di Firenze, Firenze, Italy 66bUniversità di Firenze, Firenze, Italy 67INFN Laboratori Nazionali di Frascati, Frascati, Italy 68aINFN Sezione di Genova, Genova, Italy 68bUniversità di Genova, Genova, Italy 69aINFN Sezione di Milano-Bicocca, Milano, Italy 69bUniversità di Milano-Bicocca, Milano, Italy 70aINFN Sezione di Napoli, Napoli, Italy 70bUniversità di Napoli ’Federico II’, Napoli, Italy 70cUniversità della Basilicata, Potenza, Italy 70dUniversità G. Marconi, Roma, Italy 71aINFN Sezione di Padova, Padova, Italy 71bUniversità di Padova, Padova, Italy 71cUniversità di Trento, Trento, Italy 72aINFN Sezione di Pavia, Pavia, Italy 72bUniversità di Pavia, Pavia, Italy 73aINFN Sezione di Perugia, Perugia, Italy 73bUniversità di Perugia, Perugia, Italy 74aINFN Sezione di Pisa, Pisa, Italy 74bUniversità di Pisa, Pisa, Italy 74cScuola Normale Superiore di Pisa, Pisa, Italy 75aINFN Sezione di Roma, Rome, Italy 75bSapienza Università di Roma, Rome, Italy 76aINFN Sezione di Torino, Torino, Italy 76bUniversità di Torino, Torino, Italy 76cUniversità del Piemonte Orientale, Novara, Italy 77aINFN Sezione di Trieste, Trieste, Italy 77bUniversità di Trieste, Trieste, Italy 78Kyungpook National University, Daegu, Korea 79Chonbuk National University, Jeonju, Korea 80Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea 81Hanyang University, Seoul, Korea 82Korea University, Seoul, Korea 83Seoul National University, Seoul, Korea 84University of Seoul, Seoul, Korea 85Sungkyunkwan University, Suwon, Korea 86Vilnius University, Vilnius, Lithuania 87National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-14 88Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico 89Universidad Iberoamericana, Mexico City, Mexico 90Benemerita Universidad Autonoma de Puebla, Puebla, Mexico 91Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico 92University of Auckland, Auckland, New Zealand 93University of Canterbury, Christchurch, New Zealand 94National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan 95National Centre for Nuclear Research, Swierk, Poland 96Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland 97Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa, Portugal 98Joint Institute for Nuclear Research, Dubna, Russia 99Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia 100Institute for Nuclear Research, Moscow, Russia 101Institute for Theoretical and Experimental Physics, Moscow, Russia 102Moscow Institute of Physics and Technology, Moscow, Russia 103National Research Nuclear University ’Moscow Engineering Physics Institute’ (MEPhI), Moscow, Russia 104P.N. Lebedev Physical Institute, Moscow, Russia 105Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia 106Novosibirsk State University (NSU), Novosibirsk, Russia 107State Research Center of Russian Federation, Institute for High Energy Physics, Protvino, Russia 108University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia 109Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain 110Universidad Autónoma de Madrid, Madrid, Spain 111Universidad de Oviedo, Oviedo, Spain 112Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain 113CERN, European Organization for Nuclear Research, Geneva, Switzerland 114Paul Scherrer Institut, Villigen, Switzerland 115Institute for Particle Physics, ETH Zurich, Zurich, Switzerland 116Universität Zürich, Zurich, Switzerland 117National Central University, Chung-Li, Taiwan 118National Taiwan University (NTU), Taipei, Taiwan 119Chulalongkorn University, Faculty of Science, Department of Physics, Bangkok, Thailand 120Çukurova University, Physics Department, Science and Art Faculty, Adana, Turkey 121Middle East Technical University, Physics Department, Ankara, Turkey 122Bogazici University, Istanbul, Turkey 123Istanbul Technical University, Istanbul, Turkey 124Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkov, Ukraine 125National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, Ukraine 126University of Bristol, Bristol, United Kingdom 127Rutherford Appleton Laboratory, Didcot, United Kingdom 128Imperial College, London, United Kingdom 129Brunel University, Uxbridge, United Kingdom 130Baylor University, Waco, Texas, USA 131Catholic University of America, Washington DC, USA 132The University of Alabama, Tuscaloosa, Alabama, USA 133Boston University, Boston, Massachusetts, USA 134Brown University, Providence, Rhode Island, USA 135University of California, Davis, Davis, California, USA 136University of California, Los Angeles, California, USA 137University of California, Riverside, Riverside, California, USA 138University of California, San Diego, La Jolla, California, USA 139University of California, Santa Barbara—Department of Physics, Santa Barbara, California, USA 140California Institute of Technology, Pasadena, California, USA 141Carnegie Mellon University, Pittsburgh, Pennsylvania, USA 142University of Colorado Boulder, Boulder, Colorado, USA 143Cornell University, Ithaca, New York, USA 144Fermi National Accelerator Laboratory, Batavia, Illinois, USA 145University of Florida, Gainesville, Florida, USA 146Florida International University, Miami, Florida, USA 147Florida State University, Tallahassee, Florida, USA PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-15 148Florida Institute of Technology, Melbourne, Florida, USA 149University of Illinois at Chicago (UIC), Chicago, Illinois, USA 150The University of Iowa, Iowa City, Iowa, USA 151Johns Hopkins University, Baltimore, Maryland, USA 152The University of Kansas, Lawrence, Kansas, USA 153Kansas State University, Manhattan, Kansas, USA 154Lawrence Livermore National Laboratory, Livermore, California, USA 155University of Maryland, College Park, Maryland, USA 156Massachusetts Institute of Technology, Cambridge, Massachusetts, USA 157University of Minnesota, Minneapolis, Minnesota, USA 158University of Mississippi, Oxford, Mississippi, USA 159University of Nebraska-Lincoln, Lincoln, Nebraska, USA 160State University of New York at Buffalo, Buffalo, New York, USA 161Northeastern University, Boston, Massachusetts, USA 162Northwestern University, Evanston, Illinois, USA 163University of Notre Dame, Notre Dame, Indiana, USA 164The Ohio State University, Columbus, Ohio, USA 165Princeton University, Princeton, New Jersey, USA 166University of Puerto Rico, Mayaguez, Puerto Rico, USA 167Purdue University, West Lafayette, Indiana, USA 168Purdue University Northwest, Hammond, USA 169Rice University, Houston, Texas, USA 170University of Rochester, Rochester, New York, USA 171The Rockefeller University, New York, New York, USA 172Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA 173University of Tennessee, Knoxville, Tennessee, USA 174Texas A&M University, College Station, Texas, USA 175Texas Tech University, Lubbock, Texas, USA 176Vanderbilt University, Nashville, Tennessee, USA 177University of Virginia, Charlottesville, Virginia, USA 178Wayne State University, Detroit, Michigan, USA 179University of Wisconsin—Madison, Madison, Wisconsin, USA aDeceased. bAlso at Vienna University of Technology, Vienna, Austria. cAlso at State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China. dAlso at IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France. eAlso at Universidade Estadual de Campinas, Campinas, Brazil. fAlso at Universidade Federal de Pelotas, Pelotas, Brazil. gAlso at Université Libre de Bruxelles, Bruxelles, Belgium. hAlso at Institute for Theoretical and Experimental Physics, Moscow, Russia. iAlso at Joint Institute for Nuclear Research, Dubna, Russia. jAlso at Helwan University, Cairo, Egypt. kAlso at Zewail City of Science and Technology, Zewail, Egypt. lAlso at Fayoum University, El-Fayoum, Egypt. mAlso at British University in Egypt, Cairo, Egypt. nAlso at Ain Shams University, Cairo, Egypt. oAlso at Université de Haute Alsace, Mulhouse, France. pAlso at Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia. qAlso at CERN, European Organization for Nuclear Research, Geneva, Switzerland. rAlso at RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany. sAlso at University of Hamburg, Hamburg, Germany. tAlso at Brandenburg University of Technology, Cottbus, Germany. uAlso at MTA-ELTE Lendület CMS Particle and Nuclear Physics Group, Eötvös Loránd University, Budapest, Hungary. vAlso at Institute of Nuclear Research ATOMKI, Debrecen, Hungary. wAlso at Institute of Physics, University of Debrecen, Debrecen, Hungary. xAlso at IIT Bhubaneswar, Bhubaneswar, India. yAlso at Institute of Physics, Bhubaneswar, India. zAlso at University of Visva-Bharati, Santiniketan, India. aaAlso at University of Ruhuna, Matara, Sri Lanka. PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-16 bbAlso at Isfahan University of Technology, Isfahan, Iran. ccAlso at Yazd University, Yazd, Iran. ddAlso at Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran. eeAlso at Università degli Studi di Siena, Siena, Italy. ffAlso at INFN Sezione di Milano-Bicocca, Università di Milano-Bicocca, Milano, Italy. ggAlso at Purdue University, West Lafayette, USA. hhAlso at International Islamic University of Malaysia, Kuala Lumpur, Malaysia. iiAlso at Malaysian Nuclear Agency, MOSTI, Kajang, Malaysia. jjAlso at Consejo Nacional de Ciencia y Tecnología, Mexico city, Mexico. kkAlso at Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland. llAlso at Institute for Nuclear Research, Moscow, Russia. mmAlso at National Research Nuclear University ’Moscow Engineering Physics Institute’ (MEPhI), Moscow, Russia. nnAlso at St. Petersburg State Polytechnical University, St. Petersburg, Russia. ooAlso at University of Florida, Gainesville, USA. ppAlso at P.N. Lebedev Physical Institute, Moscow, Russia. qqAlso at Budker Institute of Nuclear Physics, Novosibirsk, Russia. rrAlso at Faculty of Physics, University of Belgrade, Belgrade, Serbia. ssAlso at University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia. ttAlso at Scuola Normale e Sezione dell’INFN, Pisa, Italy. uuAlso at National and Kapodistrian University of Athens, Athens, Greece. vvAlso at Riga Technical University, Riga, Latvia. wwAlso at Universität Zürich, Zurich, Switzerland. xxAlso at Stefan Meyer Institute for Subatomic Physics. yyAlso at Adiyaman University, Adiyaman, Turkey. zzAlso at Istanbul Aydin University, Istanbul, Turkey. aaaAlso at Mersin University, Mersin, Turkey. bbbAlso at Cag University, Mersin, Turkey. cccAlso at Piri Reis University, Istanbul, Turkey. dddAlso at Izmir Institute of Technology, Izmir, Turkey. eeeAlso at Necmettin Erbakan University, Konya, Turkey. fffAlso at Marmara University, Istanbul, Turkey. gggAlso at Kafkas University, Kars, Turkey. hhhAlso at Istanbul Bilgi University, Istanbul, Turkey. iiiAlso at Rutherford Appleton Laboratory, Didcot, United Kingdom. jjjAlso at School of Physics and Astronomy, University of Southampton, Southampton, United Kingdom. kkkAlso at Instituto de Astrofísica de Canarias, La Laguna, Spain. lllAlso at Utah Valley University, Orem, USA. mmmAlso at Beykent University. nnnAlso at Bingol University, Bingol, Turkey. oooAlso at Erzincan University, Erzincan, Turkey. pppAlso at Sinop University, Sinop, Turkey. qqqAlso at Mimar Sinan University, Istanbul, Istanbul, Turkey. rrrAlso at Texas A&M University at Qatar, Doha, Qatar. sssAlso at Kyungpook National University, Daegu, Korea. PHYSICAL REVIEW LETTERS 120, 142302 (2018) 142302-17