Special case of sunset: reduction and epsilon-expansion
High Energy Physics - Phenomenology
2015-06-25 v1
Abstract
We consider two loop sunset diagrams with two mass scales m and M at the threshold and pseudotreshold that cannot be treated by earlier published formula. The complete reduction to master integrals is given. The master integrals are evaluated as series in ratio m/M and in epsilon with the help of differential equation method. The rules of asymptotic expansion in the case when q^2 is at the (pseudo)threshold are given.
Keywords
Cite
@article{arxiv.hep-ph/0207091,
title = {Special case of sunset: reduction and epsilon-expansion},
author = {A. Onishchenko and O. Veretin},
journal= {arXiv preprint arXiv:hep-ph/0207091},
year = {2015}
}
Comments
LaTeX, 13 pages, 1 figure