Charged lepton flavor violation in supersymmetric low-scale seesaw models

Scientific paper - Original scientific paper

• Author: Amon Ilakovac
• Author: Apostolos Pilaftsis
• Author: Luka Popov
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

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.

• Keywords (english): mssm; low scale see-saw; lepton flavor violation; flv; supersymmetry
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review D - Particles, Fields, Gravitation and Cosmology
• Numbering: vol. 87, no. 5, 053014
• p-ISSN: 1550-7998
• e-ISSN: 1550-2368
• DOI: https://doi.org/10.1103/PhysRevD.87.053014
• URN:NBN: urn:nbn:hr:217:397418
• Publication: 2013
• Project: Number: 119-0982930-1016; Title (croatian): Elementarne čestice, teorija polja i kozmologija; Leader: Ivica Picek; Jurisdiction: Croatia; Funding stream: ZP
• Document URL: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.87.053014
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2013) by the American Physical Society. Received 3 January 2013; published 19 March 2013.
• Created on: 2019-11-24 14:20:49