Two--loop integrals in chiral perturbation theory
高能物理 - 唯象学
2011-09-13 v1
摘要
We consider chiral perturbation theory in the meson sector at order . In the terminology of the external field technique, the two--loop graphs so generated are of the sunset type. We discuss the evaluation of several of these in the case where the masses of the particles running in the loops are equal. In particular, we present integral representations that are suitable for the evaluation of diagrams in kinematical regions where branch points and cuts are present.
关键词
引用
@article{arxiv.hep-ph/9803251,
title = {Two--loop integrals in chiral perturbation theory},
author = {J. Gasser and M. E. Sainio},
journal= {arXiv preprint arXiv:hep-ph/9803251},
year = {2011}
}
备注
28 pages, LaTeX, 5 figures embedded with epsf.sty