Artigo
Search for gluino mediated bottom- and top-squark production in multijet final states in pp collisions at 8 TeV
Fecha
2013-10-01Registro en:
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v. 725, n. 4-5, p. 243-270, 2013.
0370-2693
10.1016/j.physletb.2013.06.058
WOS:000324223100009
2-s2.0-84883052852
2-s2.0-84883052852.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
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
NCSR 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)
University College Dublin
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Petersburg Nuclear Physics Institute
Institute for Nuclear Research
Institute for Theoretical and Experimental Physics (ITEP)
P.N. Lebedev Physical Institute
Lomonosov Moscow State University
Institute for High Energy Physics
Faculty of Physics and Vinca Institute of Nuclear Sciences
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT)
Universidad Autónoma de Madrid
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CSIC-Universidad de Cantabria
European Organization for Nuclear Research
Paul Scherrer Institut
ETH Zurich
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National Taiwan University (NTU)
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Rutherford Appleton Laboratory
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Resumen
A search for supersymmetry is presented based on events with large missing transverse energy, no isolated electron or muon, and at least three jets with one or more identified as a bottom-quark jet. A simultaneous examination is performed of the numbers of events in exclusive bins of the scalar sum of jet transverse momentum values, missing transverse energy, and bottom-quark jet multiplicity. The sample, corresponding to an integrated luminosity of 19.4fb-1, consists of proton-proton collision data recorded at a center-of-mass energy of 8TeV with the CMS detector at the LHC in 2012. The observed numbers of events are found to be consistent with the standard model expectation, which is evaluated with control samples in data. The results are interpreted in the context of two simplified supersymmetric scenarios in which gluino pair production is followed by the decay of each gluino to an undetected lightest supersymmetric particle and either a bottom or top quark-antiquark pair, characteristic of gluino mediated bottom- or top-squark production. Using the production cross section calculated to next-to-leading-order plus next-to-leading-logarithm accuracy, and in the limit of a massless lightest supersymmetric particle, we exclude gluinos with masses below 1170GeV and 1020GeV for the two scenarios, respectively. © 2013 CERN.