Electromagnetic quarkonium decays at order v^7

Details Electromagnetic quarkonium decays at order v^7 Electromagnetic quarkonium decays at order v^7

2006-04-21

arxiv.org/abs/hep-ph/0604190v3

JHEP 0608:039,2006; Erratum-ibid.1104:058,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

Eq. (A.1) and following comment corrected, rest of the paper unchanged

Scientific paper

10.1088/1126-6708/2006/08/039 10

We compute S-wave and P-wave electromagnetic quarkonium decays at order v^7 in the heavy-quark velocity expansion. In the S-wave case, our calculation confirms and completes previous findings. In the P-wave case, our results are in disagreement with previous ones; in particular, we find that two matrix elements less are needed. The cancellation of infrared singularities in the matching procedure is discussed.

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