Speaker
Dr
Michael Endres
(Massachusetts Institute of Technology)
Description
The commonly adopted approach for including QED in lattice QCD simulations introduces power-law finite volume corrections to physical quantities. These effects, which are due to the long-range nature of the electromagnetic interaction, must be removed by performing simulations at multiple lattice volumes, followed by an extrapolation to the infinite volume limit. In this work, we explore the advantages and disadvantages of introducing a photon mass term as an alternative means for gaining control over the finite volume effects associated with the inclusion of QED. We present exploratory findings for hadron mass shifts due to electromagnetic interactions (i.e., for the proton, neutron, charged and neutral kaon) and corresponding mass splittings, and compare them with standard QCD+QED calculations. Preliminary results are reported for numerical studies of three flavor electroquenched QCD using ensembles corresponding to 800 MeV pions and three lattice volumes ranging from 3.4 fm to 6.7 fm.
Primary authors
Prof.
Andre Walker-Loud
(Department of Physics, College of William and Mary and Jefferson Laboratory)
Dr
Andrea Shindler
(IAS, IKP, JCHP and JARA-HPC, Forschungszentrum Jülich)
Prof.
Brian C. Tiburzi
(Department of Physics, The City College of New York, Graduate School and University Center, The City University of New York, and RIKEN BNL Research Center)
Dr
Michael Endres
(Massachusetts Institute of Technology)
