Hadronic vacuum polarization for the muon −2 from lattice QCD: Complete short and intermediate windows

Bazavov, Alexei ; Clarke, David A. ; Davies, Christine T.¿H. ; DeTar, Carleton ; El-Khadra, Aida X. ; Gámiz, Elvira ; Gottlieb, Steven ; Grebe, Anthony V. ; Hostetler, Leon ; Jay, William I. ; Jeong, Hwancheol ; Kronfeld, Andreas S. ; Lahert, Shaun ; Laiho, Jack ; Lepage, G. Peter ; Lynch, Michael ; Lytle, Andrew T. ; McNeile, Craig ; Neil, Ethan T. ; Peterson, Curtis T. ; Simone, James N. ; Sitison, Jacob W. ; Van de Water, Ruth S. ; Vaquero, Alejandro (Universidad de Zaragoza) ; Fermilab Lattice ; HPQCD ; MILC Collaborations

Resumen: We present complete results for the hadronic vacuum polarization (HVP) contribution to the muon anomalous magnetic moment aμ in the short- and intermediate-distance window regions, which account for roughly 10% and 35% of the total HVP contribution to aμ, respectively. In particular, we perform lattice-QCD calculations for the isospin-symmetric connected and disconnected contributions, as well as corrections due to strong-isospin breaking. For the short-distance window observables, we investigate the so-called log-enhancement effects as well as the significant oscillations associated with staggered quarks in this region. For the dominant, isospin-symmetric light-quark-connected contribution, we obtain aμll,SD(conn)=48.139(11)stat(91)syst[92]total×10−10 and aμll,W(conn)=206.90(14)stat(61)syst[63]total×10−10. We use Bayesian model averaging to fully estimate the covariance matrix between the individual contributions. Our determinations of the complete window contributions are aμSD=69.05(1)stat(21)syst[21]total×10−10 and aμW=236.45(17)stat(83)syst[85]total×10−10. This work is part of our ongoing effort to compute all contributions to HVP with an overall uncertainty at the few-permille level.




Published by the American Physical Society
2025

Idioma: Inglés

DOI: 10.1103/PhysRevD.111.094508

Año: 2025

Publicado en: Physical Review D 111, 9 (2025), 094508 [46 pp.]
ISSN: 2470-0010

Financiación: info:eu-repo/grantAgreement/ES/AEI/PID2022-140440NB-C21
Financiación: info:eu-repo/grantAgreement/ES/MICINN/RYC2020-030244-I

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Teórica (Dpto. Física Teórica)