6533b820fe1ef96bd1279c19

RESEARCH PRODUCT

The τ+τ− production cross section near threshold revisited

Pedro Ruiz-femenia

subject

PhysicsHigh Energy Physics - PhenomenologyNuclear and High Energy PhysicsCross section (physics)Near thresholdParticle physicsHigh Energy Physics - Phenomenology (hep-ph)FOS: Physical sciencesSigmaProduction (computer science)Atomic and Molecular Physics and Optics

description

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.

https://doi.org/10.1016/s0920-5632(03)80313-4