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Disconnected hadronic contribution to the muon magnetic moment at the physical point

T. Kawanai, Budapest-Marseille-Wuppertal Collaboration, S. Borsanyi, Z. Fodor, S. Krieg, L. Lellouch, R. Malak, K. Miura, K.K. Szabo, C. Torrero, B.C. Thot

in 34th annual International Symposium on Lattice Field Theory

Contribution: pdf


We compute the slope and curvature, at vanishing four-momentum transfer squared, of the disconnected contribution of the leading order hadron vacuum polarization function, using lattice QCD. Calculations are performed with $2+1+1$ flavors of staggered fermions directly at the physical values of the quark masses and in volumes of linear extent larger than $6$~fm. The continuum limit is carried out using five different lattice spacings.