Speaker
Daniel Hoying
Description
We present preliminary results on the scattering of pseudoscalar, vector,
and scalar mesons on a physical pion mass, 2+1 flavor mobius-DWF, ensemble with periodic
boundary conditions (PBCs) generated by the RBC and UKQCD collaborations. Using all-to-all propagators, we produce
thousands of correlator momentum combinations. Energy spectra and
phase shifts, including excited states, are then extracted via the
solutions of a generalized eigenvalue problem. Included in this talk
will also be an overview of the computational strategies employed,
including a discussion of split-CG matrix solvers (communication
avoidance) and lattice crossing symmetry (momentum combinatorics
reduction). These studies are intended to serve as groundwork for a
full PBC calculation of direct CP violation in K->pipi later this year.