Covariant propagator and chiral power counting
High Energy Physics - Theory
2021-01-01 v3 High Energy Physics - Phenomenology
Nuclear Theory
Abstract
Some one-loop diagrams with one and two external baryons/nucleons are revisited using covariant baryon propagators in chiral effective theory. We showed that it is enough to separate and subtract all the local terms that violate chiral power counting to recover chiral power counting, no need to introduce extra operations. The structures of leading chiral corrections and IR enhancement or threshold effects are 'stable' or persist as long as covariant propagators are employed for all particles.
Keywords
Cite
@article{arxiv.2009.00753,
title = {Covariant propagator and chiral power counting},
author = {Zhou Liu and Li-Hong Wen and J. -F. Yang},
journal= {arXiv preprint arXiv:2009.00753},
year = {2021}
}
Comments
9 pages, 11 figures, final version, accepted for publication in Nuclear Physics B