Year: 2025
Type: article
Abstract: A bstract 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 $$ \sqrt{s} $$ s = 14 TeV and integrated luminosity $$ \mathcal{L} $$ 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.
Source: Journal of High Energy Physics
Authors: Zilong Ding, Ying-nan Mao, Kechen Wang
Institution: Wuhan University of Technology
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4411287383