Non-universal gaugino masses and the fate of μ→eγ

2003/07/31 by Stefano Profumo, Carlos E. Yaguna · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ex #hep-ph

paper · pdf · doi:10.1016/j.nuclphysb.2003.11.027

published as Nucl.Phys. B681 (2004) 247-260 · 14 pages, 10 figures; Accepted for publication in Nuclear Physics B

arxiv created 2003/11/14 · openalex publication_date 2003/12/06 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We study charged lepton flavor violating processes in the context of supersymmetric models with non-universal gaugino masses. We consider the generic case of free gaugino masses, as well as specific models based on gaugino mediation and SU(5) GUTs. Under the assumption that the main source of lepton flavor violation resides in the off-diagonal elements of the left handed slepton mass matrix, we show that BR(mu->e gamma) strongly depends on gaugino non-universality. When M₁ and M₂ have opposite signs, cancellations occurring between the neutralino and the chargino contributions can suppress, even completely, the branching ratio of charged lepton flavor violating decays. Moreover, we find that for M₃> M₂,M₁, BR(mu->e gamma) is an increasing function of M₃.

Citations

• Nonuniversal soft supersymmetry breaking and dark matter
• Review of particle properties
• Review of Particle Physics

Cited by

• Nonuniversal scalar masses: A signal-based analysis for the CERN Large Hadron Collider
• Massive neutrinos and flavour violation

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