Description: |
anQCD: Fortran programs for couplings at complex momenta in various analytic QCD models. We provide three programs which evaluate the QCD analytic (holomorphic) couplings 𝒜 ν (Q 2 ) for complex or real squared momenta Q 2 . These couplings are holomorphic analogs of the powers a(Q 2 ) ν of the underlying perturbative QCD (pQCD) coupling a(Q 2 )≡α s (Q 2 )/π, in three analytic QCD models (anQCD): Fractional Analytic Perturbation Theory (FAPT), Two-delta analytic QCD (2δanQCD), and Massive Perturbation Theory (MPT). The index ν can be noninteger. The provided programs do basically the same job as the Mathematica package anQCD.m published by us previously [“anQCD: a mathematica package for calculations in general analytic QCD models”, Comput. Phys. Commun. 190, 182–199 (2015; doi:10.1016/j.cpc.2014.12.024)], but are now written in Fortran. |