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Electromagnetic Corrections to Meson Masses and the HVP

V. Guelpers, J. Harrison, P.A. Boyle, A. Juttner, A. Portelli, C. Sachrajda

in 34th annual International Symposium on Lattice Field Theory

Contribution: pdf


We present an exploratory study of the electromagnetic corrections to meson masses and the hadronic vacuum polarization using $N_f=2+1$ Domain Wall fermions. These corrections are estimated with two different approaches, a stochastic approach using $U(1)$ gauge configurations for the photon fields, and a perturbative approach through a QED perturbative expansion of the QCD+QED path integral. We compare results and statistical errors from both methods.