Strong-coupling constant with flavor thresholds at five loops in the modified minimal-subtraction scheme |
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Authors: | Kniehl B A Kotikov A V Onishchenko A I Veretin O L |
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Affiliation: | II. Institut für Theoretische Physik, Universit?t Hamburg, 22761 Hamburg, Germany. |
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Abstract: | We present in analytic form the matching conditions for the strong-coupling constant alphas(nf) (mu) at the flavor thresholds to four loops in the modified minimal-subtraction scheme. Taking into account the present knowledge on the coefficient beta4 of the Callan-Symanzik beta function of quantum chromodynamics, we thus derive a five-loop formula for alphas(nf) (mu) together with appropriate relationships between the asymptotic scale parameters Lamda(nf) for different numbers of flavors nf. |
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