Boccaletti, A.FZJ* ; Borsanyi, S. ; Davier, M. ; Fodor, Z. ; Frech, F. ; Gerardin, A. ; Giusti, D.FZJ* ; Kotov, A. Y.FZJ* ; Lellouch, L. ; Lippert, T.FZJ* ; Lupo, A. ; Malaescu, B. ; Mutzel, S. ; Portelli, A. ; Risch, A. ; Sjo, M. ; Stokes, F.FZJ* ; Szabo, K. K.FZJ* ; Toth, B. C. ; Wang, G. ; Zhang, Z.

2024
arXiv

Report No.: arXiv:2407.10913

Abstract: We present a new lattice QCD calculation of the leading order hadronic vacuum polarization contribution to the muon anomalous magnetic moment $a_\mu$. We reduce uncertainties compared to our earlier computation by $40\%$, arXiv:2002.12347. We perform simulations on finer lattices allowing for an even more accurate continuum extrapolation. We also include a small, long-distance contribution obtained using input from experiments in a low-energy regime where they all agree. Combined with other standard model contributions our result leads to a prediction that differs from the measurement of $a_\mu$ by only 0.9 standard deviations. This provides a remarkable validation of the standard model to 0.37ppm.

Keyword(s): High Energy Physics - Lattice (hep-lat) ; High Energy Physics - Phenomenology (hep-ph) ; High Energy Physics - Theory (hep-th) ; FOS: Physical sciences

1. MUON - Lattice determination of the muon's anomalous magnetic moment (101054515) (101054515)
2. 5111 - Domain-Specific Simulation & Data Life Cycle Labs (SDLs) and Research Groups (POF4-511) (POF4-511)