Search for pair production of third-generation leptoquarks and top squarks in pp collisions at root s=7 TeV
Type :
Article
Publication Status :
published
Access :
restrictedAccess
Abstract
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 tau lepton and a b quark. The search is based on a data sample of pp collisions at root 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 tau 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, tau lepton, and b quark, lambda'(333) are obtained. These results are the most stringent for these scenarios to date.
Source :
Physical Review Letters
Date :
2013-02-22
Volume :
110
Issue :
8
Publisher :
American Physical Society
URI
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.110.081801http://hdl.handle.net/10679/628
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