The anapole moment in scalar quantum electrodynamics
| Autor: | Y. Concha-Sánchez, Adnan Bashir, J. J. Toscano, Maria Elena Tejeda-Yeomans |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Physics
Nuclear and High Energy Physics Scalar (mathematics) Zero (complex analysis) Structure (category theory) FOS: Physical sciences General Physics and Astronomy Astronomy and Astrophysics Context (language use) Observable Scalar boson Gauge (firearms) High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Quantum electrodynamics Moment (physics) |
| Popis: | The anapole moment of a charged scalar particle is studied in a model independent fashion, using the effective Lagrangian technique, as well as radiatively within the context of scalar quantum electrodynamics (SQED). It is shown that this gauge structure is characterized by a non renormalizable interaction, which is radiatively generated at the one--loop. It is found that the resulting anapole moment for off-shell particles, though free of ultraviolet divergences, is gauge dependent and thus it is not a physical observable. We also study some of its kinematical limits. In particular, it is shown that its value comes out to be zero when all particles are on--shell. 4 pages, 1 figure |
| Databáze: | OpenAIRE |
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