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Search for an axion-like particle with forward proton scattering in association with photon pairs at ATLAS

Springer Berlin Heidelberg

A search for forward proton scattering in association with light-by-light scattering mediated by an axion-like particle is presented, using the ATLAS Forward Proton spectrometer to detect scattered protons and the central ATLAS detector to detect pairs of outgoing photons. Proton-proton collision data recorded in 2017 at a centre-of-mass energy of √ s = 13 TeV were analysed, corresponding to an integrated luminosity of 14.6 fb−1 . A total of 441 candidate events were selected. A search was made for a narrow resonance in the diphoton mass distribution, corresponding to an axion-like particle (ALP) with mass in the range 150–1600 GeV. No excess is observed above a smooth background. Upper limits on the production cross section of a narrow resonance are set as a function of the mass, and are interpreted as upper limits on the ALP production coupling constant, assuming 100% decay branching ratio into a photon pair. The inferred upper limit on the coupling constant is in the range 0.04–0.09 TeV−1 at 95% confidence level.

Article

eng

Vancouver : University of British Columbia Library

10.14288/1.0437562

Science, Faculty of; TRIUMF; Non UBC; Physics and Astronomy, Department of

10.1007/JHEP07(2023)234

Faculty

http://creativecommons.org/licenses/by/4.0/