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Title
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Search for heavy long-lived charged particles in pp collisions at =7 TeV
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| The result of a search for heavy long-lived charged particles produced in pp collisions at root s = 7 TeV at the LHC is described. The data sample has been collected using the CMS detector and corresponds to an integrated luminosity of 5.0 fb(-1). The inner tracking detectors are used to define a sample of events containing tracks with high momentum and high ionization energy loss. A second sample of events, which have high-momentum tracks satisfying muon identification requirements in addition to meeting high-ionization and long time-of-flight requirements, is analyzed independently. In both cases, the results are consistent with the expected background estimated from data. The results are used to establish cross section limits as a function of mass within the context of models with long-lived gluinos, scalar top quarks and scalar taus. Cross section limits on hyper-meson particles, containing new elementary long-lived hyper-quarks predicted by a vector-like confinement model, are also presented. Lower limits at 95% confidence level on the mass of gluinos (scalar top quarks) are found to be 1098 (737) GeV/c(2). A limit of 928 (626) GeV/c(2) is set for a gluinos (scalar top quark) that hadronizes into a neutral bound state before reaching the muon detectors. The lower mass limit for a pair produced scalar tau is found to be 223 GeV/c(2). Mass limits for a hyper-kaon are placed at 484, 602, and 747 GeV/c(2) for hyper-rho masses of 800, 1200, and 1600 GeV/c(2), respectively. (c) 2012 CERN. Published by Elsevier B.V. All rights reserved. |
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Language
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English
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Source (journal)
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Physics letters : B. - Amsterdam, 1967, currens
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Publication
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Amsterdam
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North-Holland
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2012
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ISSN
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0370-2693
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DOI
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10.1016/J.PHYSLETB.2012.06.023
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Volume/pages
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713
:4-5
(2012)
, p. 408-433
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ISI
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000306637900007
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Full text (Publisher's DOI)
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Full text (open access)
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