Search for pair production of third-generation leptoquarks and top squarks in pp collisions at √s=7 TeV
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
20/02/2013
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Resumo |
Results are presented from a search for the pair production of third-generation scalar and vector leptoquarks, as well as for top squarks in R-parity-violating supersymmetric models. In either scenario, the new, heavy particle decays into a τ lepton and a b quark. The search is based on a data sample of pp collisions at √s=7 TeV, which is collected by the CMS detector at the LHC and corresponds to an integrated luminosity of 4.8 fb -1. The number of observed events is found to be in agreement with the standard model prediction, and exclusion limits on mass parameters are obtained at the 95% confidence level. Vector leptoquarks with masses below 760 GeV are excluded and, if the branching fraction of the scalar leptoquark decay to a τ lepton and a b quark is assumed to be unity, third-generation scalar leptoquarks with masses below 525 GeV are ruled out. Top squarks with masses below 453 GeV are excluded for a typical benchmark scenario, and limits on the coupling between the top squark, τ lepton, and b quark, λ333′ are obtained. These results are the most stringent for these scenarios to date. © 2013 CERN. |
Identificador |
http://dx.doi.org/10.1103/PhysRevLett.110.081801 Physical Review Letters, v. 110, n. 8, 2013. 0031-9007 1079-7114 http://hdl.handle.net/11449/74614 10.1103/PhysRevLett.110.081801 WOS:000315141600004 2-s2.0-84874131409 2-s2.0-84874131409.pdf |
Idioma(s) |
eng |
Relação |
Physical Review Letters |
Direitos |
closedAccess |
Palavras-Chave | #Branching fractions #CMS detectors #Confidence levels #Data sample #Heavy particles #Integrated luminosity #Leptoquarks #Mass parameter #Pair production #Squarks #Supersymmetric models #The standard model #Third generation #Photons #Tellurium compounds #High energy physics |
Tipo |
info:eu-repo/semantics/article |