An update on the HVP contribution to $g_{\mu}{-}2$ in isoQCD from ETMC

TL;DR

This paper updates the calculation of the leading-order hadronic vacuum polarization contribution to the muon g-2 using lattice QCD with multiple ensembles, improving precision and understanding of systematic effects.

Contribution

It provides a new, more precise lattice QCD determination of the HVP contribution to muon g-2 using five ensembles with different parameters and two valence-quark regularizations.

Findings

Results for isovector and isoscalar components presented.

Analysis includes multiple lattice spacings and volumes.

Enhanced understanding of systematic uncertainties in HVP calculation.

Abstract

We present an update on the determination of the leading-order hadronic vacuum polarisation contribution to the muon anomalous magnetic moment in isospin-symmetric QCD by the Extended Twisted Mass Collaboration. The calculation is based on five $N_f = 2+1+1$ gauge ensembles generated with Wilson-clover twisted-mass quarks at maximal-twist and near-physical pion masses, spanning four lattice spacings and two volumes. For the dominant quark-connected contributions, we employ two distinct valence-quark regularisations and present results for both the isovector and isoscalar components.