We formulate the infrared regularization of Becher and Leutwyler in a form analogous to our recently proposed extended on-mass-shell renormalization. In our formulation, IR regularization can be applied straightforwardly to multi-loop diagrams with an arbitrary number of particles with arbitrary masses.
@article{arxiv.hep-ph/0309005,
title = {Infrared regularization of baryon chiral perturbation theory reformulated},
author = {M. R. Schindler and J. Gegelia and S. Scherer},
journal= {arXiv preprint arXiv:hep-ph/0309005},
year = {2014}
}