FAPT: a Mathematica package for calculations in QCD Fractional Analytic Perturbation Theory

preprint2012arXivOpen access

Abstract

We provide here all the procedures in \texttt{Mathematica} which are needed for the computation of the analytic images of the strong coupling constant powers in Minkowski (Aˉν(s;nf){\bar{\mathfrak A}_ν(s;n_f)} and Aνglob(s){\mathfrak A_ν^\text{glob}(s)}) and Euclidean (Aˉν(Q2;nf){\bar{\mathcal A}_ν(Q^2;n_f)} and Aνglob(Q2){\mathcal A_ν^\text{glob}(Q^2)}) domains at arbitrary energy scales (s{s} and Q2{Q^2}, correspondingly) for both schemes --- with fixed number of active flavours nf=3,4,5,6{n_f=3, 4, 5, 6} and the global one with taking into account all heavy-quark thresholds. These singularity-free couplings are inevitable elements of Analytic Perturbation Theory (APT) in QCD and its generalization --- Fractional APT, needed to apply the APT imperative for renormalization-group improved hadronic observables.

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