Measurement of dijet angular distributions and search for quark compositeness in pp collisions at √s = 7 TeV.

Journal article

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.

Authors: Khachatryan, V; Sirunyan, A; Tumasyan, A; Adam, W; Bergauer, T

• Journal: Phys Rev Lett
• Volume: 106
• Issue: 20
• Pages: 201804
• Publication date: 2011-05-20
• DOI: 10.1103/PhysRevLett.106.201804
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English