BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Kevin Pedro\, University of Maryland\n\n
\n A search for pair production of third-generation scalar leptoquarks and supersymmetric top quark partners\, top squarks\, in final states involving tau leptons and b ottom quarks is presented. The search uses events from a data sample of pr oton-proton collisions corresponding to an integrated luminosity of 19.7 i nverse femtobarns\, collected with the CMS detector at the LHC with sqrt(s )=8 TeV. The number of observed events is found to be in agreement with th e 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 b ottom quark. In addition\, this mass limit applies directly to top squarks decaying via an R-parity violating coupling lambda'\;[333]. The search also considers a similar signature from top squarks undergoing a chargino -mediated decay involving the R-parity violating coupling lambda'\;[3jk ]. 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. The constraint on the leptoquark mass is the most stringent to date\, and this is the first search for top squarks decaying via lambda'\;[3jk].
\n DTSTART:20141119T203000Z LOCATION:Physics Building\, Room 204 SUMMARY:Search for Third-Generation Scalar Leptoquarks and R-Parity Violati ng Top Squarks END:VEVENT END:VCALENDAR