Gauge-Independent Bound-State Corrections to the Toponium Decay Width

Details Gauge-Independent Bound-State Corrections to the Toponium Decay Width Gauge-Independent Bound-State Corrections to the Toponium Decay Width

1994-08-03

arxiv.org/abs/hep-ph/9408221v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, TUW-94-16

Scientific paper

10.1016/0550-3213(94)90647-5

Off-shell and relativistic bound-state corrections for the decay $t \to b+W$ are calculated to $O(\a_s^2)$ making full use of the Bethe-Salpeter formalism for weakly bound systems. Thus we are able to take into account all terms to that order in a systematic and straightforward manner. One of the previously not considered contributions cancels precisely gauge dependent terms which appeared in an earlier off-shell calculation. Important cancellations also determine the gauge-independent part.

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