The charm-quark contribution to light-by-light scattering in the muon $(g-2)$ from lattice QCD
En-Hung Chao,
Renwick J. Hudspith,
Antoine Gérardin
et al.
Abstract:We compute the hadronic light-by-light scattering contribution to the muon g − 2 from the charm quark using lattice QCD. The calculation is performed on ensembles generated with dynamical (u, d, s) quarks at the SU(3) f symmetric point with degenerate pion and kaon masses of around 415 MeV. It includes the connected charm contribution, as well as the leading disconnected Wick contraction, involving the correlation between a charm and a light-quark loop. Cutoff effects turn out to be sizeable, which leads us to… Show more
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