CERN Accelerating science

Article
Report number	hep-ph/0111324 ; CERN-TH-2001-311 ; KEK-TH-791 ; DPNU-01-32 ; CERN-TH-2001-311 ; KEK-TH-791 ; DPNU-2001-32
Title	Lepton electric dipole moments in non-degenerate supersymmetric Seesaw models
Related title	EDMS
Author(s)	Ellis, John R. (CERN) ; Hisano, Junji (KEK, Tsukuba) ; Raidal, Martti (CERN ; NICPB, Tallinn) ; Shimizu, Yasuhiro (Nagoya U.)
Affiliation	(KEK. Tsukuba) ; (Nagoya Univ.) ; (Nat. Inst. Chem. Phys. Biophys. Tallin)
Publication	2002
Imprint	26 Nov 2001
Number of pages	17
Note	16page. Some references are added
In:	Phys. Lett. B 528 (2002) 86-96
DOI	10.1016/S0370-2693(02)01197-8
Subject category	Particle Physics - Phenomenology
Abstract	In the context of supersymmetric seesaw models of neutrino masses with non-degenerate heavy neutrinos, we show that Dirac Yukawa interactions N^c_i (Y_nu)_{ij} L_j H_2 induce large threshold corrections to the slepton soft masses via renormalization. While still yielding rates for lepton-flavour-violating processes below the experimental bounds, these contributions may increase the muon and electron electric dipole moments d_mu and d_e by several orders of magnitude. In the leading logarithmic approximation, this is due to three additional physical phases in Y_nu, one of which also contributes to leptogenesis. The naive relation d_mu/d_e\approx -m_mu/m_e is violated strongly in the case of successful phenomenological textures for Y_nu, and the values of d_mu and/or d_e may be within the range of interest for the future experiments.
Copyright/License	Elsevier Science B.V.

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Email contact: junji.hisano@kek.jp