RSS 1.0Instituto de Física Teórica (IFT) - São Paulo
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From micro to macro: particle physics, gravity and cosmology
(Universidade Estadual Paulista (UNESP), 2019) [Tese de doutorado]In this thesis we review the particle content of our Universe and its cosmic evolution and show some new physics searches in these two areas. In Part I we present bounds on the energy scale of new physics and couplings of ... -
Finite time blow-up and breaking of solitary wind waves
; ; Kraenkel, R. A.
(Physical Review E, 2014) [Artigo]
The evolution of surface water waves in finite depth under wind forcing is reduced to an antidissipative Korteweg-de Vries-Burgers equation. We exhibit its solitary wave solution. Antidissipation accelerates and increases ... -
Measurement of the differential cross sections for top quark pair production as a function of kinematic event variables in pp collisions at root s=7 and 8 TeV
(Physical Review D, 2016) [Artigo]Measurements are reported of the normalized differential cross sections for top quark pair production with respect to four kinematic event variables: the missing transverse energy; the scalar sum of the jet transverse ... -
Search for resonant t(t)over-bar production in proton-proton collisions at root s=8 TeV
(Physical Review D, 2016) [Artigo]A search is performed for the production of heavy resonances decaying into top-antitop quark pairs in proton-proton collisions at root s = 8 TeV. Data used for the analyses were collected with the CMS detector and correspond ... -
Shedding light on variational autoencoders
Ruiz Vargas, Jose Cupertino; Novaes, Sergio Ferraz ; Cobe, Raphael ; Iope, Rogerio ; Stanzani, Silvio Luiz ; Tomei, Thiago (Proceedings - 2018 44th Latin American Computing Conference, CLEI 2018, 2018) [Trabalho apresentado em evento]
Deep neural networks provide the canvas to create models of millions of parameters to fit distributions involving an equally large number of random variables. The contribution of this study is twofold. First, we introduce ... -
Femtoscopic Bose–Einstein correlations of charged hadrons in pp collisions at 13 tev in CmS∗ ∗∗
Padula, Sandra S. (Acta Physica Polonica B, Proceedings Supplement, 2019) [Artigo]
Femtoscopic correlations between charged hadrons are measured for minimum-bias and for high-multiplicity events in proton–proton collisions at s = 13 TeV. The results are based on data collected with the CMS experiment at ... -
Causal faster-than-light travel from a localized second time coordinate
Nastase, Horatiu (Physical Review D, 2019) [Artigo]
I present a general relativistic model with a compactified second time coordinate that a priori allows for causal, yet faster than light travel in the background of a Friedmann-Lemaître-Robertson-Walker geometry, by local ... -
Weak coupling to unitarity crossover in Bose-Fermi mixtures: Mixing-demixing transition and spontaneous symmetry breaking in trapped systems
; Adhikari, S. K. (Physical Review A, 2019) [Artigo]
The usual treatment of a Bose-Fermi mixture relies on weak-coupling Gross-Pitaevskii (GP) and density-functional (DF) Lagrangians, often including the more realistic perturbative Lee-Huang-Yang (LHY) corrections. We suggest ... -
S-duality, entropy function and transport in AdS 4 /CMT 3
Alejo, Luis; ; Nastase, Horatiu (Journal of High Energy Physics, 2019) [Artigo]
In this paper we consider Abelian vector plus scalar holographic gravity models for 2+1 dimensional condensed matter transport, and the effect of S-duality on them. We find the transport coefficients from the electric and ... -
Stable controllable giant vortex in a trapped Bose-Einstein condensate
Adhikari, S. K. (Laser Physics Letters, 2019) [Artigo]
In a harmonically-trapped rotating Bose-Einstein condensate (BEC), a vortex of large angular momentum decays to multiple vortices of unit angular momentum from an energetic consideration. We demonstrate the formation of a ... -
Octagons I: combinatorics and non-planar resummations
; Coronado, Frank; Vieira, Pedro (Journal of High Energy Physics, 2019) [Artigo]
We explain how the ’t Hooft expansion of correlators of half-BPS operators can be resummed in a large-charge limit in N = 4 super Yang-Mills theory. The full correlator in the limit is given by a non-trivial function of ... -
Notes on the D = 11 pure spinor superparticle
Berkovits, Nathan; ; Guillen, Max ; (Journal of High Energy Physics, 2019) [Artigo]
The D = 11 pure spinor superparticle has been shown to describe linearized D = 11supergravityinamanifestlycovariantway. Anumberofauthorshaveproposedthat its correlation functions be used to compute amplitudes. The use of ... -
Multipole expansion in generalized electrodynamics
; Pimentel, B. M.; (International Journal of Modern Physics A, 2019) [Artigo]
In this paper, we study some classical aspects of Podolsky electrodynamics in the static regime. We develop the multipole expansion for the theory in both the electrostatic and the magnetostatic cases. We also address the ... -
One-dimensional bosonization and the SYK model
; Nastase, Horatiu (Journal of High Energy Physics, 2019) [Artigo]
We explore the possibility of extending the familiar bosonization of two dimensions to (0 + 1)-dimensional systems with a large number of degrees of freedom. As an application of this technique, we consider a class of ... -
Particle-vortex duality and theta terms in AdS/CMT applications
Alejo, Luis; Nastase, Horatiu (Journal of High Energy Physics, 2019) [Artigo]
In this paper we study particle-vortex duality and the effect of theta terms from the point of view of AdS/CMT constructions. We can construct the duality in 2+1 dimensional field theories with or without a Chern-Simons ... -
Limitation of the Lee–Huang–Yang interaction in forming a self-bound state in Bose–Einstein condensates
; Adhikari, Sadhan K. (Annals of Physics, 2019) [Artigo]
The perturbative Lee–Huang–Yang (LHY) interaction proportional to n3∕2, where n is the density, creates an infinitely repulsive potential at the center of a Bose–Einstein condensate (BEC) with net attraction, which stops ... -
Conformal inflation with chameleon coupling
Bernardo, Heliudson; ; Nastase, Horatiu ; (Journal of Cosmology and Astroparticle Physics, 2019) [Artigo]
We investigate the possibility that the inflaton, in particular in conformal inflation models, is also a chameleon, i.e. that it couples to the energy density of some heavy non-relativistic matter present during inflation. ... -
Climate drivers of malaria at its southern fringe in the Americas
; Cabella, Brenno; ; ; Kraenkel, Roberto André (PLoS ONE, 2019) [Artigo]
In this work we analyze potential environmental drivers of malaria cases in Northwestern Argentina. We inspect causal links between malaria and climatic variables by means of the convergent cross mapping technique, which ... -
Asymptotic four point functions
; Coronado, Frank; ; ; Vieira, Pedro ; (Journal of High Energy Physics, 2019) [Artigo]
We initiate the study of four-point functions of large BPS operators at any value of the coupling. We do it by casting it as a sum over exchange of superconformal primaries and computing the structure constants using ... -
Half-BPS vertex operators of the AdS5 × S5 superstring
Berkovits, Nathan (Journal of High Energy Physics, 2019) [Artigo]
Using the pure spinor formalism for the superstring in an AdS5 × S5 background, a simple expression is found for half-BPS vertex operators. At large radius, these vertex operators reduce to the usual supergravity vertex ...