NNLO tau+tau- production cross section at threshold

Details NNLO tau+tau- production cross section at threshold NNLO tau+tau- production cross section at threshold

2002-09-30

arxiv.org/abs/hep-ph/0210003v1

Nucl.Phys.Proc.Suppl.121:205-208,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures. To appear in the proceedings of QCD 02: High-Energy Physics International Conference in Quantum Chromodyna

Scientific paper

10.1016/S0920-5632(03)01847-4

The threshold behaviour of the cross section sigma(e+e- -> tau+tau-) is
analysed, taking into account the known higher-order corrections. At present,
this observable can be determined to next-to-next-to-leading order (NNLO) in a
combined expansion in powers of alpha_s and fermion velocities.

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