Search for the γZ decay mode of heavy photophobic axion-like particles at the LHC
Abstract We assume the coupling of Axion-like particle (ALP) to diphoton g aγγ ~ 0 and accomplish detailed analyses for the γZ decay mode of such heavy photophobic ALPs at the high luminosity-Large Hadron Collider (HL-LHC). ALPs are produced with two jets via both the s-channel vector boson exchange...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-06-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP06(2025)087 |
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| Summary: | Abstract We assume the coupling of Axion-like particle (ALP) to diphoton g aγγ ~ 0 and accomplish detailed analyses for the γZ decay mode of such heavy photophobic ALPs at the high luminosity-Large Hadron Collider (HL-LHC). ALPs are produced with two jets via both the s-channel vector boson exchange and vector boson fusion processes, with the signal process pp → jja(→ γZ(→ ℓ + ℓ − )) for ℓ = e, μ. Signal and background events are simulated at the detector-level. Preselection criteria target events with one photon, two oppositely charged electrons or muons, and two non-b-tagged jets. The ALP mass is reconstructed, and kinematic observables are input into a machine learning-based multivariate analysis for optimal background rejection. Discover sensitivities on the ALP’s coupling to di-W boson, g aWW , are presented in the mass range from 100 to 4000 GeV at center-of-mass energy s $$ \sqrt{s} $$ = 14 TeV and integrated luminosity L $$ \mathcal{L} $$ = 3 ab −1 and 140 fb −1. Sensitivities on the production cross section σ(pp → jja) times the branching ratio Br(a → γZ) are also presented. |
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| ISSN: | 1029-8479 |