Anthropic solution to the magnetic muon anomaly: the charged see-saw

TL;DR

This paper proposes a new physics model called 'charged see-saw' that explains the muon g-2 anomaly by mediating the muon mass through heavy leptons, aligning with anthropic principles and predicting observable Higgs-muon coupling modifications.

Contribution

It introduces the 'charged see-saw' model, a novel approach that links the muon g-2 anomaly with Higgs coupling changes under anthropic assumptions.

Findings

Electroweak contribution to g-2 is modified by order one factors.

The model naturally explains the size of the muon g-2 anomaly.

Predicts a correlated modification of Higgs to muon coupling.

Abstract

We present models of new physics that can explain the muon g-2 anomaly in accord with with the assumption that the only scalar existing at the weak scale is the Higgs, as suggested by anthropic selection. Such models are dubbed "charged see-saw" because the muon mass term is mediated by heavy leptons. The electroweak contribution to the g-2 gets modified by order one factors, giving an anomaly of the same order as the observed hint, which is strongly correlated with a modification of the Higgs coupling to the muon.