Artigo
Search for contact interactions in μ+μ- events in pp collisions at √s=7 TeV
Fecha
2013-02-01Registro en:
Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 87, n. 3, 2013.
1550-7998
1550-2368
10.1103/PhysRevD.87.032001
WOS:000314361500001
2-s2.0-84873685933
2-s2.0-84873685933.pdf
Autor
Yerevan Physics Institute
Institut für Hochenergiephysik der OeAW
National Centre for Particle and High Energy Physics
Universiteit Antwerpen
Vrije Universiteit Brussel
Université Libre de Bruxelles
Ghent University
Université Catholique de Louvain
Université de Mons
Centro Brasileiro de Pesquisas Físicas (CBPF)
Universidade do Estado do Rio de Janeiro (UERJ)
Universidade Estadual Paulista (Unesp)
Universidade Federal do ABC (UFABC)
Institute for Nuclear Research and Nuclear Energy
University of Sofia
Institute of High Energy Physics
Peking University
Universidad de los Andes
Technical University of Split
University of Split
Institute Rudjer Boskovic
University of Cyprus
Charles University
Egyptian Network of High Energy Physics
National Institute of Chemical Physics and Biophysics
University of Helsinki
Helsinki Institute of Physics
Lappeenranta University of Technology
CEA/Saclay
IN2P3-CNRS
Université de Haute-Alsace Mulhouse, CNRS/IN2P3
CNRS/IN2P3
Institut de Physique Nucléaire de Lyon
Tbilisi State University
I. Physikalisches Institut
III. Physikalisches Institut A
III. Physikalisches Institut B
Deutsches Elektronen-Synchrotron
University of Hamburg
Institut für Experimentelle Kernphysik
Institute of Nuclear Physics Demokritos
University of Athens
University of Ioánnina
KFKI Research Institute for Particle and Nuclear Physics
Institute of Nuclear Research ATOMKI
University of Debrecen
Panjab University
University of Delhi
Saha Institute of Nuclear Physics
Bhabha Atomic Research Centre
Tata Institute of Fundamental Research-EHEP
Tata Institute of Fundamental Research-HECR
Institute for Research in Fundamental Sciences (IPM)
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Resumen
Results are reported from a search for the effects of contact interactions using events with a high-mass, oppositely charged muon pair. The events are collected in proton-proton collisions at √s=7 TeV using the Compact Muon Solenoid detector at the Large Hadron Collider. The data sample corresponds to an integrated luminosity of 5.3 fb-1. The observed dimuon mass spectrum is consistent with that expected from the standard model. The data are interpreted in the context of a quark- and muon-compositeness model with a left-handed isoscalar current and an energy scale parameter Λ. The 95% confidence level lower limit on Λ is 9.5 TeV under the assumption of destructive interference between the standard model and contact-interaction amplitudes. For constructive interference, the limit is 13.1 TeV. These limits are comparable to the most stringent ones reported to date. © 2013 CERN. Published by the American Physical Society.