CMS-PAS-B2G-20-012

CMS-PAS-B2G-20-012
Search for W' bosons decaying to a top and a bottom quark in leptonic final states at $\sqrt{s} =$ 13 TeV
CMS Collaboration
24 March 2023

Abstract: A search for W' bosons decaying to a top and a bottom quark in final states including electrons or muons is performed with the CMS detector at the LHC. The analyzed data correspond to an integrated luminosity of 138 fb $^{-1}$ of proton-proton collisions at a center-of-mass energy of 13 TeV. In general, good agreement with the Standard Model expectation is observed. The largest observed excess is found for a W' boson mass hypothesis of 3.8 TeV with a relative decay width of 1%, with a local (global) significance of 2.6 $(2.0)$ standard deviations. Upper limits on the production cross sections of W' bosons decaying to a top and a bottom quark are set. Left- and right-handed W' bosons with masses below 3.9 and 4.3 TeV are excluded at 95% confidence level in the approximation that the new particle has negligible decay width. Limits are also set considering decay widths of up to 30% of the W' boson mass. These are the most stringent limits to date on W' bosons decaying to a top and a bottom quark.
Links: CDS record (PDF) ; Physics Briefing ; CADI line (restricted) ; These preliminary results are superseded in this paper, Accepted by JHEP. The superseded preliminary plots can be found here.

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