Searching for axionlike particles at future electron-positron colliders

Abstract

We investigate the prospects for discovering axionlike particles (ALPs) via a light by light scattering at two colliders, the future circular collider (FCC-ee) and circular electron-positron collider (CEPC). The promising sensitivities to the effective ALP-photon coupling gaγγ are obtained. Our numerical results show that the FCC-ee and CEPC might be more sensitive to the ALPs with mass 2-8 GeV than the LHC and CLIC.