Search for pair production of third-generation scalar leptoquarks and top squarks in proton–proton collisions at $\\sqrt{s}$=8 TeV
Journal
Physics Letters
Journal Volume
B739
Pages
229-249
Date Issued
2014-08
Author(s)
Abstract
A search for pair production of third-generation scalar leptoquarks and supersymmetric top quark partners, top squarks, in final states involving tau leptons and bottom quarks is presented. The search uses events from a data sample of proton-proton collisions corresponding to an integrated luminosity of 19.7 fb -1 , collected with the CMS detector at the LHC with s = 8 TeV. The number of observed events is found to be in agreement with the expected standard model background. Third-generation scalar leptoquarks with masses below 740 GeV are excluded at 95% confidence level, assuming a 100% branching fraction for the leptoquark decay to a tau lepton and a bottom quark. In addition, this mass limit applies directly to top squarks decaying via an R-parity violating coupling 333 . The search also considers a similar signature from top squarks undergoing a chargino-mediated decay involving the Rparity violating coupling 3 jk . Each top squark decays to a tau lepton, a bottom quark, and two light quarks. Top squarks in this model with masses below 580 GeV are excluded at 95% confidence level.
Type
journal article