Volume 466 - The 41st International Symposium on Lattice Field Theory (LATTICE2024) - Quark and Lepton Flavour Physics
Valence leading isospin breaking contributions to $a_{\mu}^{\mathrm{HVP-LO}}$
A. Evangelista*, S. Bacchio, R. Frezzotti, G. Gagliardi, M. Garofalo, N. Kalntis, S. Romiti, F. Sanfilippo, N. Tantalo and  for the Extended Twisted Mass Collaboration
*: corresponding author
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Pre-published on: February 17, 2025
Published on: —
Abstract
By employing the RM123 approach to QCD+QED, we computed the valence quark-connected isospin-breaking corrections to the light, strange and charm contributions at leading order in $\alpha_{\mathrm{em}}$ and $\left(\mu_d-\mu_u\right) / \Lambda_{\mathrm{QCD}}$.
Here we report the preliminary results on two different volumes ($L \sim 3.8$ fm and $L \sim 5.1$ fm) and a fixed lattice spacing (corresponding to $a_{\text {isoQCD }} \sim 0.07951(4)$ fm), obtained in the framework of the ongoing computation by ETMC of the leading-order hadronic vacuum polarization (HVP) contribution to the muon anomalous magnetic moment $a_\mu^{\mathrm{HVP}}$ in QCD+QED.
DOI: https://doi.org/10.22323/1.466.0260
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