What is a low-energy theorem ?
High Energy Physics - Phenomenology
2008-02-03 v2 Nuclear Theory
Abstract
We discuss the meaning of low-energy theorems (LETs) in the framework of the effective field theory of the standard model. Particular emphasis is put on the LET for neutral pion photoproduction off nucleons at threshold. The seemingly controversial situation surrounding this LET is clarified.
Cite
@article{arxiv.hep-ph/9409442,
title = {What is a low-energy theorem ?},
author = {G. Ecker and U. -G. Meissner},
journal= {arXiv preprint arXiv:hep-ph/9409442},
year = {2008}
}
Comments
17 pp., Latex, 2 figures included, CRN-94/52, UWThPh-1994-33, submitted to Comments Nucl. Part. Phys. (no changes at all, but by request of the E-print Admin. the figures are now in a uuencoded, compressed postscript file)