Suppression of lepton flavour violation from quantum corrections above MGUT

We study the predictions for sfermion masses and Lepton Flavour Violation (LFV) for the WMAP preferred parameter space in b − τ Yukawa-unified models with massive neutrinos. A soft term structure as predicted by an Abelian flavour symmetry combined with SU(5) RGEs for scales above M GUT , results to...

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Bibliographic Details
Published in:The journal of high energy physics 2010-06, Vol.2010 (6)
Main Authors: Gomez, M. E., Lola, S., Naranjo, P., Rodriguez-Quintero, J.
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Elementary Particles
Flavor (particle physics)
High energy physics
Leptons
Neutrinos
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Relativity Theory
String Theory
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Summary:We study the predictions for sfermion masses and Lepton Flavour Violation (LFV) for the WMAP preferred parameter space in b − τ Yukawa-unified models with massive neutrinos. A soft term structure as predicted by an Abelian flavour symmetry combined with SU(5) RGEs for scales above M GUT , results to an efficient suppression of the off-diagonal terms in the scalar soft matrices, particularly for m 0 < 100GeV. Using the WMAP bounds, this implies 35 ≤ tan β ≤ 45, 350GeV ≤ m 1/2 ≤ 1TeV, with the higher tan β values being favored. Within this framework, SU(5) unification becomes compatible with the current experimental bounds, in contrast to the conventional case where the soft terms are postulated at the GUT scale.
ISSN:1029-8479
DOI:10.1007/JHEP06(2010)053