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Search for W' → tb decays in the lepton + jets final state in pp collisions at √s = 8 TeV

Results are presented from a search for the production of a heavy gauge boson W0 decaying into a top and a bottom quark, using a data set collected by the CMS experiment at √ s = 8 TeV and corresponding to an integrated luminosity of 19.5 fb−1 . Various models of W0 -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, µ), jets, and missing transverse energy in the final state. No evidence for W0 - boson production is found and 95% confidence level upper limits on the production cross section times branching fraction are obtained. For W0 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(W0 ) > 2.05 TeV. For W0 bosons with purely lefthanded couplings, including interference effects, the observed 95% confidence level limit is M(W0 ) > 1.84 TeV. The results presented in this paper are the most stringent limits published to date.

Exotics; Hadron-Hadron Scattering

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