Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at 7 TeV

Details Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at 7 TeV Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at 7 TeV

2011-02-10

arxiv.org/abs/1102.2020v2

Phys.Rev.Lett.106:201804,2011

Physics

High Energy Physics

High Energy Physics - Experiment

Scientific paper

10.1103/PhysRevLett.106.201804

Dijet angular distributions are measured over a wide range of dijet invariant masses in pp collisions at sqrt(s) = 7 TeV, at the CERN LHC. The event sample, recorded with the CMS detector, corresponds to an integrated luminosity of 36 inverse picobarns. 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 (6.7 TeV) for destructive (constructive) interference is obtained at the 95% confidence level.

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