Artículos de revistas
Search for dark matter and large extra dimensions in pp collisions yielding a photon and missing transverse energy
Fecha
2012-06-27Registro en:
Physical Review Letters, v. 108, n. 26, 2012.
0031-9007
1079-7114
10.1103/PhysRevLett.108.261803
2-s2.0-84863192612
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 Fisicas
Universidade do Estado do Rio de Janeiro (UERJ)
Universidade Estadual Paulista (UNESP)
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
CNRS/IN2P3
Institut National de Physique Nucleaire et de Physique des Particules (IN2P3)
Institut de Physique Nucléaire de Lyon
Tbilisi State University
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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
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Institución
Resumen
Results are presented from a search for new physics in the final state containing a photon (γ) and missing transverse energy (E T). The data correspond to an integrated luminosity of 5.0fb -1 collected in pp collisions at √s=7TeV by the CMS experiment. The observed event yield agrees with standard-model expectations for the γ+E T events. Using models for the production of dark-matter particles (χ), we set 90% confidence level (C.L.) upper limits of 13.6-15.4 fb on χ production in the γ+E T state. These provide the most sensitive upper limits for spin-dependent χ-nucleon scattering for χ masses (M χ) between 1 and 100 GeV. For spin-independent contributions, the present limits are extended to M χ<3.5GeV. For models with 3-6 large extra dimensions, our data exclude extra-dimensional Planck scales between 1.64 and 1.73 TeV at 95% C.L. © 2012 CERN.