2002/09/26 by B. L. Ioffe, B.L. Ioffe, Ioffe, B. L.
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0209313
14 pages, 7 figures, invited talk on 3-rd International Sakharov Conference on Physics, Moscow, Lebedev Institute, June 24-29, to be published in the Proceedings
arxiv created 2002/09/26 · arxiv updated 2009/11/30
The recent results in QCD at low energies are reported. The theoretical analysis of hadronic tau-decay is performed in complex q2-plane. The terms of perturbation theory (PT) up to alpha3s are accounted, the terms of operator product expansion (OPE) -- up do dimension 8. The momenta of charmed quark vector current polarization operator are analyzed in 3 loops with account of dimension 4 and 6 OPE terms. The main conclusion is that in the range of low-energy phenomena under consideration PT and OPE are in good agreement with experiment starting from Q2=-q2 ~ 1 GeV2. The values of alphas(m2tau), alphas<qq>2, <(alphas/pi)G2> and mc(mc)were found.