The tau+ tau- production cross section near threshold revisited

Details The tau+ tau- production cross section near threshold revisited The tau+ tau- production cross section near threshold revisited

2002-10-25

arxiv.org/abs/hep-ph/0210358v1

eConf C0209101 (2002) TU14

Physics

High Energy Physics

High Energy Physics - Phenomenology

Invited talk at the Seventh International Workshop on Tau Lepton Physics (TAU02), Santa Cruz, Ca, USA, Sept 2002, 5 pages, LaT

Scientific paper

10.1016/S0920-5632(03)80313-4

Next-to-next-to-leading contributions to the cross section sigma(e+e- ->
tau+tau-) at energies close to threshold are analysed, taking into account the
known non-relativistic effects and O(alpha^2) corrections. The numerical
changes with respect to previous works are small, but the new corrections give
a true estimate of the uncertainty in the theoretical calculation.

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