Muon $g-2$ at multi-TeV muon collider

TL;DR

This paper explores how a multi-TeV muon collider can test the muon g-2 anomaly, either through direct measurement or by probing heavy new physics contributions, offering a potential pathway to discover physics beyond the standard model.

Contribution

It demonstrates that a high-energy muon collider can fully test the muon g-2 discrepancy, even without discovering new particles within its energy range.

Findings

Heavy new physics contributions can be tested at multi-TeV muon colliders.

Direct measurement of g-2 is possible via Higgs and photon channels.

Collider energy up to 10 TeV can probe the muon g-2 anomaly.

Abstract

The long-standing discrepancy of muon $g-2$ is a hint of new physics beyond the standard model of particle physics. In this letter we show that heavy new physics contribution can be fully tested at a muon collider with center-of-mass energy up to $O(10)\,$TeV. Even if there is no new particle in this energy range, one can measure the $g-2$ directly via the channel to a Higgs boson and a monochromatic photon.