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Strong-Coupling Constant with Flavor Thresholds at Five Loops in the MS-bar Scheme by Kniehl, B. A.; Kotikov, A. V.; Onishchenko, A. I.; Veretin, O. L. is a scholarly article available to read on EtoBox.

What is Strong-Coupling Constant with Flavor Thresholds at Five Loops in the MS-bar Scheme about?

We present in analytic form the matching conditions for the strong-coupling constant alpha_s^(n_f)(mu) at the flavor thresholds to four loops in the modified minimal-subtraction scheme. Taking into account the present knowledge on the coefficient beta_4 of the Callan-Symanzik beta function of quantum chromo-dynamics, we thus derive a five-loop formula for alpha_s^(n_f)(mu) together with appropriate relationships between the asymptotic scale parameters Lambda^(n_f) for different numbers of flavors n_f.

Author

Kniehl, B. A.; Kotikov, A. V.; Onishchenko, A. I.; Veretin, O. L.

Published

2006

Language

EN