We present a lattice procedure to calculate the leptonic pion decay width with only exponentially-suppressed finite-volume errors using the infinite-volume reconstruction method. In our approach, the infrared divergences from virtual-photon exchange and
radiative emission can be cancelled in a simple, direct way using lattice hadronic functions as inputs.
Electromagnetic corrections to leptonic pion decay from lattice QCD using infinite-volume reconstruction method
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Pre-published on:
January 31, 2020
Published on:
August 27, 2020
Abstract
DOI: https://doi.org/10.22323/1.363.0259
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.