Two-Loop Matching Coefficients for Heavy Quark Currents

B. A. Kniehl; A. Onishchenko; J. H. Piclum; M. Steinhauser

doi:10.1016/j.physletb.2006.05.023

Two-Loop Matching Coefficients for Heavy Quark Currents

高能物理 - 唯象学 2009-11-11 v1

作者: B. A. Kniehl , A. Onishchenko , J. H. Piclum , M. Steinhauser

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摘要

In this paper we consider the matching coefficients up to two loops between Quantum Chromodynamics (QCD) and Non-Relativistic QCD (NRQCD) for the vector, axial-vector, scalar and pseudo-scalar currents. The structure of the effective theory is discussed and analytical results are presented. Particular emphasis is put on the singlet diagrams.

关键词

perturbative qcd qcd coupling constant quantum chromodynamics

引用

@article{arxiv.hep-ph/0604072,
  title  = {Two-Loop Matching Coefficients for Heavy Quark Currents},
  author = {B. A. Kniehl and A. Onishchenko and J. H. Piclum and M. Steinhauser},
  journal= {arXiv preprint arXiv:hep-ph/0604072},
  year   = {2009}
}

备注

9 pages

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