General formulae for f(1) ---> f(2) gamma
Feb, 2003Citations per year
Abstract:
At one-loop level the decay f1 --> f2 gamma, where f1 and f2 are two spin-1/2 particles with the same electric charge, is mediated by a boson B and a spin-1/2 fermion F. The boson B may have either spin 0 - interacting with the fermions through Dirac matrices 1 and gamma5 - or spin 1 - with V+A and V-A couplings to the fermions. I give general formulae for the one-loop electroweak amplitude of f1 --> f2 gamma in all these cases.Note:
- 11 pages LATEX
- fermion: radiative decay
- decay: amplitude analysis
- weak interaction: current
- invariance: gauge
- Feynman graph: higher-order
- coupling: Yukawa
- boson: exchange
- boson: scalar
- gauge boson: massive
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