Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at √s=7 TeV
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Khachatryan, Vladimir; Brochero Cifuentes, Javier Andrés




Date
2011-05-18Derechos
Atribución 3.0 España.©2011 CERN, for the CMS Collaboration
Publicado en
Physical Review Letters, vol 106, iss. 20, art. num. 201804 (2011)
Publisher
American Physical Society.
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Abstract:
Dijet angular distributions are measured over a wide range of dijet invariant masses in pp collisions at √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 Λ+=5.6 TeV (Λ-=6.7 TeV) for destructive (constructive) interference is obtained at the 95% confidence level.
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