Speaker
Harvey Byron Meyer
(CERN)
Description
We present a lattice QCD calculation of the charged–neutral pion mass splitting at O($\alpha_{\rm em}$) using a coordinate-space photon propagator regulated à la Pauli-Villars (PV). The calculation is performed using CLS ensembles. The elastic contribution receives a dedicated treatment to reduce finite-size effects and speed up the approach to infinite PV cutoff. The same methods are being applied to the kaon mass splitting, which allows for a calibration of the bare up/down quark mass difference.
Authors
Alessandro De Santis
(Helmholtz-Institut Mainz, Johannes Gutenberg-Universität Mainz)
Dominik Erb
Harvey Byron Meyer
(CERN)