The pion-pion scattering phase shift is computed using LapH propagators. The LapH method for computing quark propagators is used to form two-particle correlation functions with a number of different operators. Excited state energies of two-particle states on 2+1 dynamical, anisotropic lattices (Mpi=390 MeV) are computed to determine the phase shift in the isospin-2 channel. The signal for t-to-t diagrams for the isospin-0 channel are also presented to demonstrate the efficacy of the stochastic LapH method which combines LapH with diluted Z4 noise sources.
Cite
@article{arxiv.1011.5277,
title = {Phase Shift with LapH Propagators},
author = {John Bulava and Justin Foley and Keisuke J. Juge and Colin J. Morningstar and Michael J. Peardon and Chik-Him Wong},
journal= {arXiv preprint arXiv:1011.5277},
year = {2011}
}
Comments
7 pages, 2 figures, Talk presented at 28th International Symposium On Lattice Field Theory (Lattice 2010) 13-19 Jun 2010, Villasimius, Sardinia, Italy