Interplay of ALP Couplings at a Muon Collider

TL;DR

This paper investigates how axion-like particles with TeV-scale masses and couplings can be produced and detected at a future multi-TeV muon collider, highlighting the collider's potential to explore their complex phenomenology.

Contribution

It analyzes the interplay of various ALP couplings at a muon collider, emphasizing multiple production channels and their phenomenological implications.

Findings

Multiple production channels are viable at a muon collider.

Coupling structures significantly influence ALP decay modes.

Potential to probe TeV-scale ALPs with diverse couplings.

Abstract

Axion-like particles can couple to Standard Model gluons, electroweak gauge bosons, and massive fermions. A future multi-TeV muon collider provides a favorable environment to probe axion-like particles through multiple production channels, including vector boson fusion via electroweak gauge boson couplings and the top-associated production mediated by direct fermionic couplings. Motivated by the quality issue of the QCD axion, we focus on axion-like particles with masses and decay constants around the TeV scale. We explore how different axion-like particle couplings shape its production and decay modes, revealing a rich and intricate phenomenological landscape.