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

Journal Article · Sun May 01 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.106.201804· OSTI ID:1155735

Khachatryan, Vardan ^[1]

---

1. Yerevan Physics Inst. (Armenia)

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 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 is obtained at the 95% confidence level.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: CMS Collaboration
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1155735
• Report Number(s): FERMILAB-PUB-11-769-CMS; CERN-PH-EP-2010-092; arXiv eprint number arXiv:1102.2020
• Journal Information: Physical Review Letters, Vol. 106, Issue 20
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS