Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at {radical}(s)=7 TeV

Journal Article · Fri May 20 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.106.201804· OSTI ID:21538347

Khachatryan, V; Sirunyan, A M; Tumasyan, A ^[1]; Adam, W; Bergauer, T; Dragicevic, M; Eroe, J; Fabjan, C; Friedl, M; Fruehwirth, R; Ghete, V M; Hammer, J; Haensel, S; Hartl, C; Hoch, M; Hoermann, N; Hrubec, J; Jeitler, M; Kasieczka, G; Kiesenhofer, W ^[2]

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1. Yerevan Physics Institute, Yerevan (Armenia)
2. Institut fuer Hochenergiephysik der OeAW, Wien (Austria)

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

• OSTI ID: 21538347
• Journal Information: Physical Review Letters, Vol. 106, Issue 20; Other Information: DOI: 10.1103/PhysRevLett.106.201804; (c) 2011 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

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