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Scientific article
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Search for the Zγ decay mode of new high-mass resonances in pp collisions at s=13 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inPhysics letters. B, vol. 848, 138394
Publication date2024
First online date2023-12-12
Abstract

This letter presents a search for narrow, high-mass resonances in the Zγ final state with the Z boson decaying into a pair of electrons or muons. The s=13 TeV pp collision data were recorded by the ATLAS detector at the CERN Large Hadron Collider and have an integrated luminosity of 140 fb−1. The data are found to be in agreement with the Standard Model background expectation. Upper limits are set on the resonance production cross section times the decay branching ratio into Zγ. For spin-0 resonances produced via gluon–gluon fusion, the observed limits at 95% confidence level vary between 65.5 fb and 0.6 fb, while for spin-2 resonances produced via gluon–gluon fusion (or quark–antiquark initial states) limits vary between 77.4 (76.1) fb and 0.6 (0.5) fb, for the mass range from 220 GeV to 3400 GeV.

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Keywords
  • P p: colliding beams
  • Gluon gluon: fusion
  • P p: scattering
  • Resonance: production
  • Narrow resonance
  • Resonance: mass
  • Spin: resonance
  • Spin: 0
  • Spin: 2
  • Z0: leptonic decay
  • Photon: associated production
  • Decay: time
  • ATLAS
  • Muon: pair production
  • Initial state
  • Decay modes
  • CERN Lab
  • Electron: pair production
  • CERN LHC Coll
  • Background
  • Quark antiquark
  • Channel cross section: branching ratio: upper limit
  • Experimental results
  • 13000 GeV-cms
Citation (ISO format)
ATLAS Collaboration. Search for the Zγ decay mode of new high-mass resonances in <i>pp</i> collisions at s=13 TeV with the ATLAS detector. In: Physics letters. B, 2024, vol. 848, p. 138394. doi: 10.1016/j.physletb.2023.138394
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ISSN of the journal0370-2693
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