Authors
Citation
A. Czarnecki et Ag. Grozin, HQET CHROMOMAGNETIC INTERACTION AT 2 LOOPS, Physics letters. Section B, 405(1-2), 1997, pp. 142-149
Citations number
29
Categorie Soggetti
Physics
Journal title
ISSN journal
03702693
Volume
405
Issue
1-2
Year of publication
1997
Pages
142 - 149
Database
ISI
SICI code
0370-2693(1997)405:1-2<142:HCIA2L>2.0.ZU;2-S
Abstract
We present the coefficient of the chromomagnetic interaction operator,
the only unknown coefficient in the Heavy Quark Effective Theory (HQE
T) lagrangian up to the 1/m level, with the two-loop accuracy by match
ing scattering amplitudes of an on-shell heavy quark in an external fi
eld in full QCD and HQET, and obtain the two-loop anomalous dimension
of this operator in HQET. (C) 1997 Elsevier Science B.V.