Axion-Like Particles at the ILC Giga-Z

A bstract Axion-Like Particles (ALPs) are a generic, calculable, and well motivated extension of the Standard Model with far reaching phenomenology. ALPs that couple only to hypercharge represent one subset of such models, coupling the ALP to both photons and the Z boson. We examine the current cons...

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Veröffentlicht in:The journal of high energy physics 2021-08, Vol.2021 (8), p.1-15, Article 120
Hauptverfasser: Steinberg, Noah, Wells, James D.
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Sprache:eng
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Zusammenfassung:A bstract Axion-Like Particles (ALPs) are a generic, calculable, and well motivated extension of the Standard Model with far reaching phenomenology. ALPs that couple only to hypercharge represent one subset of such models, coupling the ALP to both photons and the Z boson. We examine the current constraints on this class of models with an ALP mass in the 100 MeV to 100 GeV range, paying particular attention to the region between 100 MeV to 10 GeV, a portion of parameter space which is ill constrained by current experiments. We show that the more than 10 9 Z bosons produced in the Giga-Z mode of the future ILC experiment, combined with the highly granular nature of its detectors, will allow for ALPs coupled to hypercharge to be discovered with couplings down to nearly 10 − 5 GeV − 1 over a range of masses from 0.4 to 50 GeV.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP08(2021)120