A new contribution to the flavour-changing lepton- photon vertex

Details A new contribution to the flavour-changing lepton- photon vertex A new contribution to the flavour-changing lepton- photon vertex

1997-06-09

arxiv.org/abs/hep-ph/9706295v1

Nuovo Cim. A110 (1997) 143-147; Erratum-ibid. A110 (1997) 457

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, LaTeX style; IL NUOVO CIMENTO A (1997) in press

Scientific paper

We show that the correct perturbation theory for mixed fermion states leads to nonvanishing contributions of the dimension-four vertex operators for flavour-changing transitions. Their contributions to the amplitude are of the same order of magnitude as the dimension- five vertex operators. Considerations are valid irrespective of the electroweak model. A complete and correct evaluation of the neutrino lifetime for particular electroweak models could be of greate importance in the theoretical cosmology and astrophysics.

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