A new approach to evaluate the leading hadronic corrections to the muon g-2

TL;DR

This paper introduces a novel method to evaluate the leading hadronic corrections to the muon g-2 by measuring the effective electromagnetic coupling in the space-like region through Bhabha scattering, offering a potential alternative to existing approaches.

Contribution

It presents a new approach using space-like electromagnetic coupling measurements from Bhabha scattering data, which could improve the precision of hadronic correction estimates for muon g-2.

Findings

Potential feasibility at flavor factories.

May achieve accuracy comparable to current dispersive methods.

Offers an alternative approach for hadronic correction evaluation.

Abstract

We propose a novel approach to determine the leading hadronic corrections to the muon g-2. It consists in a measurement of the effective electromagnetic coupling in the space-like region extracted from Bhabha scattering data. We argue that this new method may become feasible at flavor factories, resulting in an alternative determination potentially competitive with the accuracy of the present results obtained with the dispersive approach via time-like data.