HQET chromomagnetic interaction at two loops

A. Czarnecki; A. G. Grozin

doi:10.1016/S0370-2693(97)00587-X 10.1016/j.physletb.2007.05.016

HQET chromomagnetic interaction at two loops

高能物理 - 唯象学 2008-11-26 v3

作者: A. Czarnecki , A. G. Grozin

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摘要

We present the coefficient of the chromomagnetic interaction operator, the only unknown coefficient in the Heavy Quark Effective Theory (HQET) lagrangian up to the $1/m$ level, with the two-loop accuracy by matching scattering amplitudes of an on-shell heavy quark in an external field in full QCD and HQET, and obtain the two-loop anomalous dimension of this operator in HQET.

引用

@article{arxiv.hep-ph/9701415,
  title  = {HQET chromomagnetic interaction at two loops},
  author = {A. Czarnecki and A. G. Grozin},
  journal= {arXiv preprint arXiv:hep-ph/9701415},
  year   = {2008}
}

备注

10 pages, LaTeX2e, 2 eps figures included. Revised discussion of (n_f-1)-flavour HQET included

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