Dijet angular distributions are measured over a wide range of dijet invariant masses in pp collisions at √s=7TeV, at the CERN LHC. The event sample, recorded with the CMS detector, corresponds to an integrated luminosity of 36pb-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+=5.6TeV (Λ -=6.7TeV) for destructive (constructive) interference is obtained at the 95% confidence level. © 2011 American Physical Society.

Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., et al. (2011). Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at sqrt[s]=7  TeV. PHYSICAL REVIEW LETTERS, 106(20) [10.1103/PhysRevLett.106.201804].

Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at sqrt[s]=7  TeV

BENAGLIA, ANDREA DAVIDE;DE GUIO, FEDERICO;DI MATTEO, LEONARDO;GHEZZI, ALESSIO;MALBERTI, MARTINA;MARTELLI, ARABELLA;MASSIRONI, ANDREA;MORONI, LUIGI;PAGANONI, MARCO;RAGAZZI, STEFANO;TABARELLI DE FATIS, TOMMASO;TANCINI, VALENTINA;Branca, A;GOVONI, PIETRO;DINARDO, MAURO EMANUELE;
2011

Abstract

Dijet angular distributions are measured over a wide range of dijet invariant masses in pp collisions at √s=7TeV, at the CERN LHC. The event sample, recorded with the CMS detector, corresponds to an integrated luminosity of 36pb-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+=5.6TeV (Λ -=6.7TeV) for destructive (constructive) interference is obtained at the 95% confidence level. © 2011 American Physical Society.
Articolo in rivista - Articolo scientifico
Dijet distribution; quark; pp collision
English
2011
106
20
201804
none
Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., et al. (2011). Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at sqrt[s]=7  TeV. PHYSICAL REVIEW LETTERS, 106(20) [10.1103/PhysRevLett.106.201804].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/48085
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