Weak dipole moments of heavy fermions with flavor violation induced by Z′ gauge bosons

A calculation of weak dipole moments of charged fermions of the standard model at the one-loop level, in the context of a general effective extended neutral current model with flavor changing Z ′ f i f ¯ j vertices, is presented. We give numerical predictions for the anomalous weak magnetic dipole m...

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Veröffentlicht in:Journal of physics. G, Nuclear and particle physics Nuclear and particle physics, 2022-07, Vol.49 (7), p.75004
Hauptverfasser: Montaño-Domínguez, J, Quezadas-Vivian, B, Ramírez-Zavaleta, F, Tututi, E S
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Sprache:eng
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Zusammenfassung:A calculation of weak dipole moments of charged fermions of the standard model at the one-loop level, in the context of a general effective extended neutral current model with flavor changing Z ′ f i f ¯ j vertices, is presented. We give numerical predictions for the anomalous weak magnetic dipole moment a f i w , and the weak electric dipole moment (WEDM) d f i w , for the τ lepton and t quark. For several Z ′ gauge bosons considered, we find that, for the τ lepton, the best prediction for the real part of a τ w is of the order of 10 −9 , while the imaginary part is four orders of magnitude below. The highest value for the WEDM, d τ w , corresponds to 10 −26 e cm, for its real part, and the imaginary part is three orders of magnitude below. Moreover, we found for the top quark, that the best prediction for the real part of a t w is of the order of 10 −7 and its imaginary part is of the order of 10 −11 . We also found that d t w is of the order of 10 −26 e cm for its real part, and its imaginary part can be as high as 10 −31 e cm.
ISSN:0954-3899
1361-6471
DOI:10.1088/1361-6471/ac69ff