Publicação: Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at root s=7 TeV
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Amer Physical Soc
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Dijet angular distributions are measured over a wide range of dijet invariant masses in pp collisions at root s = 7 TeV, at the CERN LHC. The event sample, recorded with the CMS detector, corresponds to an integrated luminosity of 36 pb(-1). The data are found to be in good agreement with the predictions of perturbative QCD, and yield no evidence of quark compositeness. With a modified frequentist approach, a lower limit on the contact interaction scale for left-handed quarks of Lambda(+) = 5.6 TeV (Lambda(-) = 6.7 TeV) for destructive (constructive) interference is obtained at the 95% confidence level.
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Physical Review Letters. College Pk: Amer Physical Soc, v. 106, n. 20, p. 14, 2011.
