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Search for W' to tb decays in the lepton + jets final state in pp collisions at sqrt(s) = 8 TeV

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 sqrt(s)=8 TeV and corresponding to an integrated luminosity of 19.5 inverse femtobarns. 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')>2.05 TeV. 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.
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http://hal.in2p3.fr/in2p3-00944682
Contributor : Sylvie Flores <>
Submitted on : Tuesday, February 11, 2014 - 7:50:43 AM
Last modification on : Friday, September 10, 2021 - 1:50:07 PM

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S. Chatrchyan, S. Baffioni, F. Beaudette, P. Busson, C. Charlot, et al.. Search for W' to tb decays in the lepton + jets final state in pp collisions at sqrt(s) = 8 TeV. Journal of High Energy Physics, Springer, 2014, 5, pp.108. ⟨10.1007/JHEP05(2014)108⟩. ⟨in2p3-00944682⟩

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