| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1850932 | Physics Letters B | 2015 | 5 Pages |
Abstract
We compute the decoupling constant ζmζm relating light quark masses of effective nlnl-flavour QCD to (nl+1)(nl+1)-flavour QCD to four-loop order. Immediate applications are the evaluation of the MS¯ charm quark mass with five active flavours and the bottom quark mass at the scale of the top quark or even at GUT scales. With the help of a low-energy theorem ζmζm can be used to obtain the effective coupling of a Higgs boson to light quarks with five-loop accuracy. We briefly discuss the influence on Γ(H→bb¯).
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Authors
Tao Liu, Matthias Steinhauser,