Searching for axion-like particles at future electron-positron colliders

TL;DR

This paper explores the potential to detect axion-like particles at future electron-positron colliders through light-by-light scattering, showing they could surpass current collider sensitivities for certain mass ranges.

Contribution

It provides new sensitivity estimates for ALP detection at FCC-ee and CEPC, highlighting their advantages over existing colliders for specific ALP mass ranges.

Findings

FCC-ee and CEPC could detect ALPs with masses 2-10 GeV more effectively than LHC and CLIC.

The study demonstrates promising sensitivities to the ALP-photon coupling at future colliders.

Light-by-light scattering is a viable channel for ALP searches at upcoming electron-positron colliders.

Abstract

We investigate the prospects for discovering axion-like particles (ALPs) via a light-by-light (LBL) 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 $g_{a\gamma\gamma}$ are obtained. Our numerical results show that the FCC-ee and CEPC might be more sensitive to the ALPs with mass 2 GeV $\sim$ 10 GeV than the LHC and CLIC.