Lepton Flavour Violation from Yukawa Operators, Supergravity and the See-Saw mechanism

Abstract

We investigate the phenomenological impact of different sources of lepton flavour violation arising from realistic models based on supergravity mediated supersymmetry breaking with Yukawa operators. We discuss four distinct sources of lepton flavour violation in such models: minimum flavour violation, arising from neutrino masses and the see-saw mechanism with RG running; supergravity flavour violation due to the non-universal structure of the supergravity model; flavour violation due to Froggatt-Nielsen (FN) fields appearing in Yukawa operators developing supersymmetry breaking F-terms and contributing in a non-universal way to soft trilinear terms; and finally heavy Higgs flavour violation arising from the heavy Higgs fields used to break the unified gauge symmetry which also appear in Yukawa operators and behave analagously to the FN fields. In order to quantify the relative effects, we study a particular type I string inspired model based on a supersymmetric Pati-Salam model arising from intersecting D-branes, supplemented by a U(1) family symmetry

35 pages, 3 figures; Additional references

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Cited by in corpus (11)

• Fermion Masses and Mixing Angles from SU(3) Family Symmetry and Unification
• Constraints on SUSY Lepton Flavour Violation by rare processes
• Massive Neutrinos and Flavour Violation
• Study of theory and phenomenology of some classes of family symmetry and unification models
• Lepton Flavor Violation, Neutralino Dark Matter and the Reach of the LHC
• Anomalous U(1) D-term Contribution in Type I String Models
• Scherk-Schwarz Supersymmetry Breaking for Quasi-localized Matter Fields and Supersymmetry Flavor Violation
• Phenomenology of Twisted Moduli in Type I String Inspired Models
• SUSY Seesaw and FCNC
• Lepton flavour violation in realistic non-minimal supergravity models
• The flavour problem and family symmetry