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Search for heavy resonances decaying into a $W$ boson and a Higgs boson in final states with leptons and $b$-jets in $139~fb^{-1}$ of $pp$ collisions at $\sqrt{s}=13~\mathrm{TeV}$ with the ATLAS detector



2021

1-23 () [10.3204/PUBDB-2021-05305]  GO

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Report No.: ATLAS-CONF-2021-026

Abstract: This note presents a search for a new resonance $W^\prime$ decaying into a $W$ boson and a $125~\mathrm{GeV}$ Higgs boson $H$ in the $\ell\nu bb$ final state, where $\ell = e,$ or $\mu$, using $pp$ collision data at 13 TeV corresponding to an integrated luminosity of 139 fb$^{-1}$ collected by the ATLAS detector at the LHC. The search is conducted by examining the reconstructed invariant mass distributions of $W^\prime \to WH$ candidates in the mass range from $400$ $\mathrm{GeV}$ to $5$ $\mathrm{TeV}$. No significant excess is observed and $95$ % confidence level upper limits between 1.3 pb and 0.56 fb are placed on the production cross-section times branching fraction of $W'$ bosons in Heavy-Vector-Triplet models.

Keyword(s): p p: scattering ; p p: colliding beams ; resonance: production ; resonance: heavy ; resonance: decay modes ; W': decay modes ; W: leptonic decay ; Higgs particle: hadronic decay ; final state: ((n)jet lepton) ; jet: bottom ; bottom: pair production ; bottom: particle identification ; ATLAS ; channel cross section: branching ratio: upper limit ; CERN LHC Coll ; mass spectrum ; model: triplet ; experimental results ; W' --> W Higgs particle ; 13000 GeV-cms


Note: Preliminary results. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2021-026. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2021-026. Preliminary results. The authors list may be incomplete!

Contributing Institute(s):
  1. LHC/ATLAS Experiment (ATLAS)
Research Program(s):
  1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
Experiment(s):
  1. LHC: ATLAS

Appears in the scientific report 2021
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Creative Commons Attribution CC BY 4.0 ; OpenAccess
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 Record created 2021-12-13, last modified 2021-12-16


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