Scattering at physical pion mass is still an exploratory field in lattice QCD. This generally involves the extraction of excited states through multi-particle correlators on systems with resonances. In that context, distillation has been demonstrated to be effective both as a smearing kernel and a computational tool. Motivated by the study of the smearing profile of the distillation operator, we compare stochastic and exact distillation cases for different numbers of Laplacian eigenvectors using an RBC-UKQCD Nf=2+1 domain-wall fermion lattice with a physical pion mass.
@article{arxiv.2112.09804,
title = {$K \pi$ scattering at physical pion mass using distillation},
author = {Nelson Pitanga Lachini and Peter Boyle and Felix Erben and Michael Marshall and Antonin Portelli},
journal= {arXiv preprint arXiv:2112.09804},
year = {2021}
}