Abstract

It is shown that the electric dipole moment of the τ lepton several orders of magnitude larger than predicted by the standard model can be generated from mixings in models with vectorlike mutiplets. The electric dipole moment (EDM) of the τ lepton arises from loops involving the exchange of the W, the charginos, the neutralinos, the sleptons, the mirror leptons, and the mirror sleptons. The EDM of the Dirac τ neutrino is also computed from loops involving the exchange of the W, the charginos, the mirror leptons, and the mirror sleptons. A numerical analysis is presented, and it is shown that the EDMs of the τ lepton and the τ neutrino which lie just a couple of orders of magnitude below the sensitivity of the current experiment can be achieved. Thus the predictions of the model are testable in an improved experiment on the EDM of the τ and the τ neutrino.

Notes

Originally published in Physical Review D v.81 (2010): 033007. DOI: 10.1103/PhysRevD.81.033007

Keywords

electric dipole moment, EDM, neutrinos, vectorlike multiplets

Subject Categories

Dipole moments, Leptons (Nuclear physics)

Disciplines

Physics

Publisher

American Physical Society

Publication Date

2-11-2010

Rights Information

Copyright (2010) American Physical Society

Rights Holder

American Physical Society

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