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Title

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

AuthorsBrochero Cifuentes, J. A. ; Cabrillo, I. J. ; Calderon, Alicia ; Chamizo Llatas, M.; Chuang, S. H. ; Duarte Campderros, J. ; Felcini, Marta ; Fernández, M. ; Gómez, G. ; González Sánchez, J. ; Jorda, C. ; Lobelle Pardo, P. ; López Virto, A. ; Marco, Jesús ; Marco, Rafael ; Martínez-Rivero, Celso ; Matorras, Francisco ; Muñoz Sánchez, F. J. ; Piedra, Jonatan ; Rodrigo, Teresa ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Sobron Sañudo, M. ; Vila, Iván ; Vilar, Rocío
Issue DateMay-2011
PublisherAmerican Physical Society
CitationPhysical Review Letters 106(20): 201804 (2011)
AbstractDijet 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.
Description14 páginas, 2 figuras.-- Creative Commons Attribution 3.0 License.-- PACS numbers: 13.85.Rm, 12.38.Bx, 12.38.Qk, 12.60.Rc.-- CMS Collaboration: et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.106.201804
URIhttp://hdl.handle.net/10261/46207
DOI10.1103/PhysRevLett.106.201804
ISSN0031-9007
E-ISSN1079-7114
Appears in Collections:(IFCA) Artículos
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