2024/11/13 by Constantia Alexandrou, Alexandrou, C., Simone Bacchio +33 · 4 citations
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.2411.08852
openalex publication_date 2024/11/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/03
We present a lattice calculation of the hadronic vacuum polarization (HVP) contribution of the strange and charm quarks to the anomalous magnetic moment of the muon in isospin symmetric QCD. We employ the gauge configurations generated by the Extended Twisted Mass Collaboration (ETMC) with Nf ¼ 2 þ 1 þ 1 flavors of Wilson-clover twisted-mass quarks at five lattice spacings and at values of the quark mass parameters that are close and/or include the isospin symmetric QCD point of interest. After computing the small corrections necessary to precisely match this point, and carrying out an extrapolation to the continuum limit based on the data at lattice spacings a ≃ 0.049, 0.057, 0.068, 0.080 fm and spatial lattice sizes up to L ≃ 7.6 fm, we obtain aHVP μ ðsÞ¼ð53.57 0.63Þ × 10−10 and aHVP μ ðcÞ¼ð14.56 0.13Þ × 10−10, for the quark-connected strange and charm contributions, respectively. Our findings agree well with the corresponding results by other lattice groups.