QED box amplitude in heavy fermion production

Details QED box amplitude in heavy fermion production QED box amplitude in heavy fermion production

2002-06-11

arxiv.org/abs/hep-ph/0206100v1

Eur.Phys.J.C25:553-561,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 2 figures

Scientific paper

10.1140/epjc/s2002-01030-5

We evaluate the two-photon box contribution to heavy fermion production in electron positron annihilation, that provides O(alpha^2) electromagnetic corrections to the Born cross section. The study of its non-relativistic expansion, relevant at energies close to the threshold of production, is also performed. We also verify that the threshold expansion of the one-loop integrals correctly reproduces our results, thus extending the applicability of this technique to heavy fermion production diagrams.

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