QCD Decoupling at Four Loops

K. G. Chetyrkin; J. H. Kühn; C. Sturm

doi:10.1016/j.nuclphysb.2006.03.020

QCD Decoupling at Four Loops

高能物理 - 唯象学 2008-11-26 v1

作者: K. G. Chetyrkin , J. H. Kühn , C. Sturm

在 arXiv 上查看 ↗ PDF ↗ DOI ↗

摘要

We present the matching condition for the strong coupling contant alpha_s at a heavy quark threshold to four loops in the modified minimal subtraction scheme. Our results lead to further decrease of the theoretical uncertainty of the evolution of the strong coupling constant through heavy quark thresholds. Using a low energy theorem we furthermore derive the effective coupling of the Higgs boson to gluons (induced by a virtual heavy quark) in four- and (partially) through five-loop approximation.

关键词

qcd coupling constant quantum chromodynamics radiative corrections in particle physics

引用

@article{arxiv.hep-ph/0512060,
  title  = {QCD Decoupling at Four Loops},
  author = {K. G. Chetyrkin and J. H. Kühn and C. Sturm},
  journal= {arXiv preprint arXiv:hep-ph/0512060},
  year   = {2008}
}

备注

21 pages, 2 figures, the complete paper is also available via the www at http://www-ttp.physik.uni-karlsruhe.de/Preprints/

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