- Conference date: 8–9 October 2012
- Location: Mexico City, Mexico
In this paper, we review the search of possible physics effects beyond the standard model on the electromagnetic charge and anapole form factors, and , for a no massive Dirac neutrino, when these quantities are calculated in the frame of an effective electroweak Yang-Mills theory, which induces the most general SU L (2)–invariant Lorentz tensor structure of nonrenormalizable type for the WWγ vertex. We found that in this frame, besides the standard model contribution, the additional contribution to and ( and , respectively) are gauge independent and finite functions of q 2 after adopting a renormalization scheme. These form factors, and , get contribution at the one loop level only from the proper neutrino electromagnetic vertex. Besides, the relation is still fulfilled and hence the relation is obtained, just as in the SM. Using the experimental constraint on the anomalous WWγ vertex, a value for the additional contribution to the charge radius of cm 2 is gotten, which is one order of magnitude lower than the SM value.
- Beyond the Standard Model
- Form factors
- Special unitary groups
- Dirac neutrinos
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