Nucleon-pion-state contribution to nucleon two-point correlation functions
High Energy Physics - Lattice
2015-10-14 v2 Nuclear Theory
Abstract
We study the nucleon-pion-state contribution to the QCD two-point function of the standard nucleon interpolating fields. For sufficiently small quark masses these two-particle states are expected to have a smaller total energy than the single-particle excited states. We calculate the nucleon-pion-state contribution to leading order in chiral perturbation theory. Both parity channels are considered. We find the nucleon-pion-state contribution to be small, contributing at the few percent level to the effective mass in the positive parity channel.
Cite
@article{arxiv.1503.03649,
title = {Nucleon-pion-state contribution to nucleon two-point correlation functions},
author = {Oliver Bar},
journal= {arXiv preprint arXiv:1503.03649},
year = {2015}
}
Comments
17 pages, 2 figures. Revised version: minor changes in some sections, appendix added, references added, typos corrected, results unchanged. Matches published version