Search for $\mathrm{W^\prime}$ decaying to a vector-like quark and a top or bottom quark in the all-jets final state - INSPIRE

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Search for $\mathrm{W^\prime}$ decaying to a vector-like quark and a top or bottom quark in the all-jets final state

CMS

Collaboration

2021

24 pages

Published: 2021

Report number:

CMS-PAS-B2G-20-002,
CMS-PAS-B2G-20-002

Experiments:

CERN-LHC-CMS,
CERN-LHC-CMS

View in:

CERN Document Server

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Abstract: (CDS)

A search for a heavy

\mathrm{W^\prime}

boson resonance decaying to one B or T vector-like quark and a top or bottom quark, respectively, is presented. The analysis is performed using proton-proton collision data collected from the year 2016 to 2018 with the CMS detector at the LHC. The data correspond to an integrated luminosity of 137

~\mathrm{fb^{-1}}

at a center-of-mass energy of

13~\mathrm{TeV}

. Both decay channels result in a final state with a top quark, a Higgs or Z boson, and a b quark, each produced with significant energy. The all-hadronic decays of both the Higgs boson and the top quark are considered. The final-state jets, some of which correspond to merged decay products of a boosted top quark and a Higgs or Z boson, are selected using jet substructure techniques, which help to suppress standard model backgrounds. A

\mathrm{W^\prime}

boson signal would appear as a narrow peak in the invariant mass distribution of these three jets. No significant deviation in data with respect to the standard model background predictions is observed. The

95\%

confidence level upper limits on the cross section for

\mathrm{W^\prime}

boson production and the subsequent decay into a top quark, Higgs or Z boson, and b quark are set as a function of the

\mathrm{W^\prime}

boson mass, for several vector-like quark mass hypotheses. We exclude a

\mathrm{W^\prime}

boson in this channel with a mass below 3.2

~\mathrm{TeV}

given benchmark model assumptions, and additionally present limits based on generalizations of these assumptions. This is the first search for a

\mathrm{W^\prime}

boson in this channel using the full 2016 to 2018 CMS data.

Note:

Preliminary results •
Preliminary results

Monte-Carlo
p p: colliding beams
quark: vector particle
quark: mass
quark: decay modes
W': mass
W': decay modes
top: boosted particle
boson: production
boson: resonance

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