Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-05-27
Phys.Rev.D72:114019,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, 9 eps pics, 2 feynmp diagrams, uses amsmath, graphicx, feynmp, epsf, some references were added
Scientific paper
10.1103/PhysRevD.72.114019
The processes of muons (tau) and charged pions pairs production at electron-positron annihilation with first order radiative corrections are considered. The calculation results are presented assuming the energies of final particles (cms implied) to be not far significantly from threshold production. The invariant mass distributions for the muon (tau) and pion pairs are obtained both for the initial and final state radiation. Some analytical calculations are illustrated numerically. The pions were assumed to be point-like objects and scalar QED was applied for calculation. The QED radiative corrections related to the final state radiation, additional to the well known Coulomb factor, are treated near threshold region exactly.
Fedotovich G. V.
Ignatov F. V.
Kuraev Eduard A.
~Bystritskiy ~M. Yu.
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