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The asymptotic behavior of the heavy quark form factors at higher order
J. Blümlein, P. Marquard, N. Rana
In the asymptotic limit , the heavy quark form factors exhibit Sudakov behavior. We study the corresponding renormalization group equations of the heavy quark form fac…
Numerical Implementation of Harmonic Polylogarithms to Weight w = 8
J. Ablinger, J. Blümlein, M. Round +1
We present the FORTRAN-code HPOLY.f for the numerical calculation of harmonic polylogarithms up to w = 8 at an absolute accuracy of or better. Using algeb…
Computer algebra tools for Feynman integrals and related multi-sums
Johannes Blümlein, Carsten Schneider
In perturbative calculations, e.g., in the setting of Quantum Chromodynamics (QCD) one aims at the evaluation of Feynman integrals. Here one is often faced with the problem to simp…
NLO PDFs from the ABMP16 fit
S. Alekhin, J. Blümlein, S. Moch
We perform a global fit of parton distribution functions (PDFs) together with the strong coupling constant and the quark masses , and at next-to-leading orde…