Charged lepton flavor violation in supersymmetric low-scale seesaw models

Ilakovac, Amon and Pilaftsis, Apostolos and Popov, Luka (2013) Charged lepton flavor violation in supersymmetric low-scale seesaw models. Physical Review D, 87 (5). pp. 53014-23. ISSN 1550-7998

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Abstract

We study charged lepton flavor violation in low- scale seesaw models of minimal supergravity, which realize large neutrino Yukawa couplings thanks to approximate lepton-number symmetries. There are two dominant sources of lepton flavor violation in such models. The first source originates from the usual soft supersymmetry-breaking sector, whilst the second one is entirely supersymmetric and comes from the supersymmetric neutrino Yukawa sector. Within the framework of minimal supergravity, we consider both sources of lepton flavor violation, soft and supersymmetric, and calculate a number of possible lepton-flavor- violating transitions, such as the photonic decays of muons and taus, μ→eγ, τ→eγ and τ→μγ, their neutrinoless three-body decays, μ→eee, τ→eee, τ→μμμ, τ→eeμ and τ→eμμ, and the coherent μ→e conversion in nuclei. After taking into account the exclusion bounds placed by present experiments of lepton flavor violation, we derive combined theoretical limits on the universal heavy Majorana mass scale mN and the light-to-heavy neutrino mixings. Supersymmetric low-scale seesaw models offer distinct correlated predictions for lepton- flavor-violating signatures, which might be discovered in current and projected experiments, such as MEG, COMET/PRISM, Mu2e, super-BELLE and LHCb.

Item Type: Article
Keywords: mssm, low scale see-saw, lepton flavor violation, flv, supersymmetry
Date: March 2013
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2013) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-0982930-1016
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 08 Jul 2014 08:19
Last Modified: 23 Feb 2016 15:27
URI: http://digre.pmf.unizg.hr/id/eprint/2214

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