Axion-Like Particles at the ILC Giga-Z

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 such models, coupling ALP both photons $Z$ boson. We examine current constraints on this class models an mass in 100 MeV GeV range, paying particular attention region between 10 GeV, portion parameter space which is ill constrained by experiments. show more than $10^{9}$ bosons produced Giga-Z mode future ILC experiment, combined highly granular nature its detectors, will allow for coupled be discovered couplings down nearly $10^{-5}\,\rm{GeV^{-1}}$ over range masses from 0.4 50 GeV.