@article{78fecfdf6c3e40dfbcdf2dbe7f065bbc,
title = "Two-loop anomalous dimension of the chromo-magnetic moment of a heavy quark",
abstract = "We find that the anomalous dimension (in the MS scheme) of the chromo-magnetic operator gs{\=h}vσμνG μνhv in the heavy-quark effective theory is (Equation Presented) generalizing the one-loop expression known previously. To derive the two-loop result, we use the reparametrization invariance and the virial theorem. After performing infrared subtractions, all two-loop integrals are of propagator type and are evaluated by a recurrence relation for tensor integrals.",
author = "G. Amor{\'o}s and M. Beneke and M. Neubert",
note = "Funding Information: We are indebted to A. Grozin for communicating partial results of an independentc alculation of ymagb ased on a different technique. One{\textquoteright}of us (M.N.) would like to thank M. Ciuchini, J. Kiirner and D. Kreimer for useful discussions. G.A. acknowledgesa grant from the Generalitat Valenciana, and partial support by DGICYT under grant PB94-0080. He also acknowledgest he hospitality of the CERN Theory Division, where this researchw as performed.",
year = "1997",
month = may,
day = "22",
doi = "10.1016/S0370-2693(97)00345-6",
language = "English",
volume = "401",
pages = "81--90",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "Elsevier B.V.",
number = "1-2",
}