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Search for Pair Production of Third-Generation Leptoquarks and Top Squarks in pp Collisions at s√=7 TeV
Baringer, Philip S. Bean, Alice Benelli, Gabriele Kenny, R. P., III Murray, Michael J. Sanders, Stephen J. Stringer, Robert W. Tinti, Gemma Wood, Jeffrey Scott Chatrchyan, S.
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Kenny, R. P., III
Murray, Michael J.
Sanders, Stephen J.
Stringer, Robert W.
Tinti, Gemma
Wood, Jeffrey Scott
Chatrchyan, S.
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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 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, λ′333 are obtained. These results are the most stringent for these scenarios to date.
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This is the publisher's version, also available electronically from http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.110.081801.
Date
2013-02-20
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American Physical Society
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Citation
S. Chatrchyan et al. (CMS Collaboration). (2013). "Search for Pair Production of Third-Generation Leptoquarks and Top Squarks in pp Collisions at s√=7 TeV." Physical Review Letters, 110(8):081801. http://dx.doi.org/10.1103/PhysRevLett.110.081801.