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Search for W ' -> tb decays in the lepton plus jets final state in pp collisions at root s=8 TeV

By S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Eroe, C. Fabjan, M. Friedl, R. Fruehwirth, V. M. Ghete, C. Hartl, N. Hoermann, J. Hrubec, M. Jeitler, W. Kiesenhofer, V. Knuenz, M. Krammer, I. Kraetschmer, D. Liko, I. Mikulec, D. Rabady, B. Rahbaran, H. Rohringer, R. Schoefbeck, J. Strauss, A. Taurok, W. Treberer-Treberspurg, W. Waltenberger, C.E. Wulz, V. Mossolov, N. Shumeiko, J. Suarez Gonzalez, S. Alderweireldt, M. Bansal, S. Bansal, T. Cornelis and DeWolf

Abstract

Results are presented from a search for the production of a heavy gauge boson W' decaying into a top and a bottom quark, using a data set collected by the CMS experiment at root s = 8 TeV and corresponding to an integrated luminosity of 19.5 fb(-1). Various models of W'-boson production are studied by allowing for an arbitrary combination of left-and right-handed couplings. The analysis is based on the detection of events with a lepton (e, mu), jets, and missing transverse energy in the final state. No evidence for W'-boson production is found and 95% confidence level upper limits on the production cross section times branching fraction are obtained. For W' bosons with purely right-handed couplings, and for those with left-handed couplings assuming no interference effects, the observed 95% confidence level limit is M(W') > 2.05TeV. For W' bosons with purely left-handed couplings, including interference effects, the observed 95% confidence level limit is M(W') > 1.84 TeV. The results presented in this paper are the most stringent limits published to date.Physics, Particles & FieldsSCI(E)1ARTICLE5nul

Topics: Exotics, Hadron-Hadron Scattering, TOP-QUARK, RESONANCES, EVENTS, MODEL
Publisher: journal of high energy physics
Year: 2014
DOI identifier: 10.1007/JHEP05(2014)108
OAI identifier: oai:localhost:20.500.11897/214341
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