Thresholds in FAPT: Euclid vs Minkowski

Details Thresholds in FAPT: Euclid vs Minkowski Thresholds in FAPT: Euclid vs Minkowski

2008-10-18

arxiv.org/abs/0810.3315v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 2 tables, 10 figures. Invited talk at the 15th International Seminar on High Energy Physics "QUARKS-2008", Sergiev P

Scientific paper

We give a short introduction to the Analytic Perturbation Theory (APT) in QCD, describe its problems and suggest as a tool for their resolution the Fractional APT (FAPT). We also describe shortly how to treat heavy-quark thresholds in FAPT. As an applications of this technique we discuss (i) the pion form factor calculation in the Euclidean FAPT and (ii) the Higgs boson decay $H^0\to b\bar{b}$ in Minkowskian FAPT. We conclude with comparison of both approaches, Euclidean and Minkowskian FAPT.

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