Two-Loop Anomalous Dimension of the Chromo-Magnetic Moment of a Heavy Quark

Details Two-Loop Anomalous Dimension of the Chromo-Magnetic Moment of a Heavy Quark Two-Loop Anomalous Dimension of the Chromo-Magnetic Moment of a Heavy Quark

1997-01-24

arxiv.org/abs/hep-ph/9701375v1

Phys.Lett. B401 (1997) 81-90

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 4 figures

Scientific paper

10.1016/S0370-2693(97)00345-6

We find that the anomalous dimension (in the $\bar{MS}$ scheme) of the chromo-magnetic operator $g_s\bar h_v\sigma_{\mu\nu} G^{\mu\nu} h_v$ in the heavy-quark effective theory is \gamma_{mag} = (C_A\alpha_s / 2\pi) [1 + ( 17/18 C_A - 13/18 T_F n_f)\alpha_s/\pi + O(\alpha_s^2)] 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.

Affiliated with

Also associated with

No associations

Rating

Two-Loop Anomalous Dimension of the Chromo-Magnetic Moment of a Heavy Quark does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Two-Loop Anomalous Dimension of the Chromo-Magnetic Moment of a Heavy Quark, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-Loop Anomalous Dimension of the Chromo-Magnetic Moment of a Heavy Quark will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-88159