KIT | KIT-Bibliothek | Impressum | Datenschutz
Open Access Logo
§
Volltext
URN: urn:nbn:de:swb:90-446363
Originalveröffentlichung
DOI: 10.1016/j.physletb.2014.10.063

Search for pair production of third-generation scalar leptoquarks and top squarks in proton-proton collisions at s=8 TeV

Khachatryan, V.; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.; Ghete, V.M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; Kiesenhofer, W.; Knünz, V.; Krammer, M.; Krätschmer, I.; Liko, D.; ... mehr

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 λ333′ . The search also considers a similar signature from top squarks undergoing a chargino-mediated decay involving the R-parity violating coupling λ3jk′ . 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% conf ... mehr


Zugehörige Institution(en) am KIT Institut für Experimentelle Kernphysik (IEKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2014
Sprache Englisch
Identifikator ISSN: 0370-2693
KITopen ID: 1000044636
Erschienen in Physics Letters B
Band 739
Seiten 229-249
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft KITopen Landing Page