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Nonperturbative Contributions in an Analytic Running Coupling of QCD | | Aleksey I. Alekseev
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31 May 2001 | | Journal: | J.Phys. G27 (2001) L117-2202 | | Subject: | hep-ph | | Abstract: | In the framework of analytic approach to QCD the nonperturbative contributions in running coupling of strong interaction up to 4-loop order are obtained in an explicit form. For all $Q>Lambda$ they are shown to be represented in the form of an expansion in inverse powers of Euclidean momentum squared. The expansion coefficients are calculated for different numbers of active quark flavors $n_f$ and for different number of loops taken into account. On basis of the stated expansion the effective method for precise calculation of the analytic running coupling can be developed. | | Source: | arXiv, hep-ph/0105338 | | Services: | Forum | Review | PDF | Favorites | |
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