Intermediate window observable for the hadronic vacuum polarization contribution to the muon $g-2$ from O$(a)$ improved Wilson quarks - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

Intermediate window observable for the hadronic vacuum polarization contribution to the muon $g-2$ from O$(a)$ improved Wilson quarks

M. Cè
  • Fonction : Auteur
G. von Hippel
  • Fonction : Auteur
R.J. Hudspith
  • Fonction : Auteur
S. Kuberski
  • Fonction : Auteur
H.B. Meyer
  • Fonction : Auteur
K. Miura
  • Fonction : Auteur
D. Mohler
  • Fonction : Auteur
K. Ottnad
  • Fonction : Auteur
S. Paul
  • Fonction : Auteur
A. Risch
  • Fonction : Auteur
T. San José
  • Fonction : Auteur
H. Wittig
  • Fonction : Auteur

Résumé

Following the publication of the new measurement of the anomalous magnetic moment of the muon, the discrepancy between experiment and the theory prediction from the $g-2$ theory initiative has increased to $4.2\,\sigma$. Recent lattice QCD calculations predict values for the hadronic vacuum polarization contribution that are larger than the data-driven estimates, bringing the Standard Model prediction closer to the experimental measurement. Euclidean time windows in the time-momentum representation of the hadronic vacuum polarization contribution to the muon $g-2$ can help clarify the discrepancy between the phenomenological and lattice predictions. We present our calculation of the intermediate distance window contribution using $N_\mathrm{f}=2+1$ flavors of O$(a)$ improved Wilson quarks. We employ ensembles at six lattice spacings below $0.1\,$fm and pion masses down to the physical value. We present a detailed study of the continuum limit, using two discretizations of the vector current and two independent sets of improvement coefficients. Our result at the physical point displays a tension of $3.9\,\sigma$ with a recent evaluation of the intermediate window based on the data-driven method.

Dates et versions

hal-03897851 , version 1 (14-12-2022)

Identifiants

Citer

M. Cè, A. Gérardin, G. von Hippel, R.J. Hudspith, S. Kuberski, et al.. Intermediate window observable for the hadronic vacuum polarization contribution to the muon $g-2$ from O$(a)$ improved Wilson quarks. 39th International Symposium on Lattice Field Theory, Aug 2022, Bonn, Germany. pp.321, ⟨10.22323/1.430.0321⟩. ⟨hal-03897851⟩
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