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

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.

Comments: 10 pages, 5 figures, Contribution to the 42nd International Symposium on Lattice Field Theory (Lattice2025), 2-8 November 2025, Tata Institute of Fundamental Research, Mumbai, India