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Search for R-parity violating decays of a top squark in proton–proton collisions at √s=8 TeV

CMS Collaboration; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; ... mehr

Abstract (englisch):

The results of a search for a supersymmetric partner of the top quark (top squark), pair-produced in proton–proton collisions at View the MathML sources=8 TeV, are presented. The search, which focuses on R-parity violating, chargino-mediated decays of the top squark, is performed in final states with low missing transverse momentum, two oppositely charged electrons or muons, and at least five jets. The analysis uses a data sample corresponding to an integrated luminosity of 19.7 fb−1 collected with the CMS detector at the LHC in 2012. The data are found to be in agreement with the standard model expectation, and upper limits are placed on the top squark pair production cross section at 95% confidence level. Assuming a 100% branching fraction for the top squark decay chain, View the MathML sourcet˜→tχ˜1±,χ˜1±→ℓ±+jj, top squark masses less than 890 (1000) GeV for the electron (muon) channel are excluded for the first time in models with a single nonzero R-parity violating coupling View the MathML sourceλijk′(i,j,k≤2)(i,j,k≤2), where i,j,ki,j,k correspond to the three generations.


Volltext §
DOI: 10.5445/IR/1000056609
Originalveröffentlichung
DOI: 10.1016/j.physletb.2016.06.039
Scopus
Zitationen: 11
Dimensions
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Fakultät für Physik – Institut für Experimentelle Kernphysik (IEKP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 0370-2693, 1873-2445
urn:nbn:de:swb:90-566098
KITopen-ID: 1000056609
Erschienen in Physics letters / B
Verlag North-Holland Publishing
Band 760
Seiten 178-201
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Schlagwörter CMS; Physics; Supersymmetry; Leptons; Low missing transverse energy
Nachgewiesen in Dimensions
Scopus
Web of Science
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