Electroweak corrections to the toponium decay width

Details Electroweak corrections to the toponium decay width Electroweak corrections to the toponium decay width

1994-12-13

arxiv.org/abs/hep-ph/9412291v1

Phys.Lett. B345 (1995) 532-536

Physics

High Energy Physics

High Energy Physics - Phenomenology

to be published in Phys. Lett. B, 9 pages LaTeX (incl. 3 figures) uses feynman, epic and eepic

Scientific paper

10.1016/0370-2693(94)01647-U

We discuss one-loop electroweak corrections to the decay width of toponium. We calculate the energy-level shifts by expanding around the solution of the Bethe-Salpeter equation in the instantaneous approximation, in analogy with the positronium case. We show that first-order electroweak effects are suppressed by at least four powers of the strong coupling constant, and are therefore negligible compared with QCD corrections. The calculation is manifestly gauge invariant and takes into account the contributions to the decay rate due to both Coulomb enhancement and phase space reduction effects.

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