We present the three-loop QCD corrections to the quark chromomagnetic moment including two different nonzero masses. This is a necessary ingredient to obtain the corresponding corrections to the chromomagnetic coefficient in the Heavy Quark Effective Theory (HQET) Lagrangian.
@article{arxiv.0906.0130,
title = {Light quark mass effects in the chromomagnetic moment},
author = {S. Bekavac and A. Grozin and D. Seidel and M. Steinhauser},
journal= {arXiv preprint arXiv:0906.0130},
year = {2009}
}