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.
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
Recommended Citation
Ibrahim, Tarek and Nath, Pran, "Large τ and τ neutrino electric dipole moments in models with vectorlike multiplets" (2010). Physics Faculty Publications. Paper 458.
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Notes
Originally published in Physical Review D v.81 (2010): 033007. DOI: 10.1103/PhysRevD.81.033007