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Fractional Analytic QCD beyond Leading Order in timelike region

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arxiv 2302.12171 v2 pith:ISOEIB7D submitted 2023-02-23 hep-ph

Fractional Analytic QCD beyond Leading Order in timelike region

classification hep-ph
keywords analyticorderresultsacquiringapplicableapplyapproachesargument
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In this paper we show that, as in the spacelike case, the inverse logarithmic expansion is applicable for all values of the argument of the analytic coupling constant. We present two different approaches, one of which is based primarily on trigonometric functions, and the latter is based on dispersion integrals. The results obtained up to the 5th order of perturbation theory, have a compact form and their acquiring is much easier than the methods that have been used before. As an example, we apply our results to study the Higgs boson decay into a bb pair.

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