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Search for a W' boson decaying to a bottom quark and a top quark in pp collisions at sqrt(s) = 7 TeV

Abstract : Results are presented from a search for a W' boson using a dataset corresponding to 5.0 inverse femtobarns of integrated luminosity collected during 2011 by the CMS experiment at the LHC in pp collisions at sqrt(s)=7 TeV. The W' boson is modeled as a heavy W boson, but different scenarios for the couplings to fermions are considered, involving both left-handed and right-handed chiral projections of the fermions, as well as an arbitrary mixture of the two. The search is performed in the decay channel W' to t b, leading to a final state signature with a single lepton (e, mu), missing transverse energy, and jets, at least one of which is tagged as a b-jet. A W' boson that couples to fermions with the same coupling constant as the W, but to the right-handed rather than left-handed chiral projections, is excluded for masses below 1.85 TeV at the 95% confidence level. For the first time using LHC data, constraints on the W' gauge coupling for a set of left- and right-handed coupling combinations have been placed. These results represent a significant improvement over previously published limits.
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Contributor : Sylvie Flores Connect in order to contact the contributor
Submitted on : Tuesday, August 7, 2012 - 1:02:33 PM
Last modification on : Monday, December 13, 2021 - 9:15:07 AM

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S. Chatrchyan, M. Besancon, S. Choudhury, M. Dejardin, D. Denegri, et al.. Search for a W' boson decaying to a bottom quark and a top quark in pp collisions at sqrt(s) = 7 TeV. Physics Letters B, Elsevier, 2013, 718, pp.1229-1251. ⟨10.1016/j.physletb.2012.12.008⟩. ⟨in2p3-00723060⟩



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