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arXiv · 1107.5970

Simultaneous decoupling of bottom and charm quarks

Andrey G. Grozin·Maik Hoeschele·Jens Hoff·Matthias Steinhauser
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Abstract

We compute the decoupling relations for the strong coupling, the light quark masses, the gauge-fixing parameter, and the light fields in QCD with heavy charm and bottom quarks to three-loop accuracy taking into account the exact dependence on $m_c/m_b$. The application of a low-energy theorem allows the extraction of the three-loop effective Higgs-gluon coupling valid for extensions of the Standard Model with additional heavy quarks from the decoupling constant of $α_s$.

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Andrey G. Grozin, Maik Hoeschele, Jens Hoff, Matthias Steinhauser. 2011-07-29. Simultaneous decoupling of bottom and charm quarks. https://doi.org/10.1007/jhep09(2011)066

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