Two-loop anomalous dimension of the chromo-magnetic moment of a heavy quark

G. Amorós, M. Beneke, M. Neubert

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

We find that the anomalous dimension (in the MS scheme) of the chromo-magnetic operator gsvσμνG 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.

Original languageEnglish
Pages (from-to)81-90
Number of pages10
JournalPhysics Letters B
Volume401
Issue number1-2
DOIs
StatePublished - 22 May 1997
Externally publishedYes

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