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Search for high-mass Wγ and Zγ resonances using hadronic W/Z boson decays from 139 fb$^{−1}$ of pp collisions at $ \sqrt{s} $ = 13 TeV with the ATLAS detector
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Search for high-mass Wγ and Zγ resonances using hadronic W/Z boson decays from 139 fb$^{−1}$ of pp collisions at $ \sqrt{s} $ = 13 TeV with the ATLAS detector

Georges Aad, Braden Keim Abbott, Dale Abbott, Adam Abed Abud, Kira Abeling, Deshan Kavishka Abhayasinghe, Haider Abidi, Asmaa Aboulhorma, Halina Abramowicz, Henso Abreu, …
Deutsches Elektronen-Synchrotron, DESY, Hamburg
2023
DOI: https://doi.org/10.3204/pubdb-2023-05160

摘要

background CERN LHC Coll channel cross section: branching ratio: upper limit collimator data analysis method experimental results GeV-cms Hadron-Hadron Scattering model: production narrow resonance p p: colliding beams p p: scattering photon: associated production resonance: mass resonance: production resonance: radiative decay sensitivity vector boson: pair production W: associated production W: hadronic decay Z0: associated production Z0: hadronic decay
A search for high-mass charged and neutral bosons decaying to Wγ and Zγ final states is presented in this paper. The analysis uses a data sample of $ \sqrt{s} $ = 13 TeV proton-proton collisions with an integrated luminosity of 139 fb$^{−1}$ collected by the ATLAS detector during LHC Run 2 operation. The sensitivity of the search is determined using models of the production and decay of spin-1 charged bosons and spin-0/2 neutral bosons. The range of resonance masses explored extends from 1.0 TeV to 6.8 TeV. At these high resonance masses, it is beneficial to target the hadronic decays of the W and Z bosons because of their large branching fractions. The decay products of the high-momentum W/Z bosons are strongly collimated and boosted-boson tagging techniques are employed to improve the sensitivity. No evidence of a signal above the Standard Model backgrounds is observed, and upper limits on the production cross-sections of these bosons times their branching fractions to Wγ and Zγ are derived for various boson production models.[graphic not available: see fulltext]

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