Aspects of supersymmetric models with a radiatively driven inverted mass hierarchy

Howard Baer, Csaba Balázs, Michal Brhlik, Pedro Mercadante, Xerxes Tata, Yili Wang

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39 Citations (Scopus)


A promising way to reconcile naturalness with a decoupling solution to the SUSY flavor and CP problems is suggested by models with a radiatively driven inverted mass hierarchy (RIMH). The RIMH models arise naturally within the context of SUSY SO(10) grand unified theories. In their original form, RIMH models suffer from two problems: (1) obtaining the radiative breakdown of electroweak symmetry; and (2) generating the correct masses for third generation fermions. The first problem can be solved by the introduction of 5O(10)D-term contributions to scalar masses. We show that correct fermion masses can indeed be obtained, but at the cost of limiting the magnitude of the hierarchy that can be generated. We go on to compute predictions for the neutralino relic density as well as for the rate for the decay b-sy, and show that these yield significant constraints on model parameter space. We show that only a tiny corner of model parameter space is accessible to Fermilab Tevatron searches, assuming an integrated luminosity of 25 fb'. We also quantify the reach of the CERN LHC collider for this class of models, and find values of IHJ 1600 GeV to be accessible assuming just 10 fb' of integrated luminosity. In an appendix, we list the two loop renormalization group equations for the MSSM plus right handed neutrino model that we have used in our analysis.

Original languageEnglish
Article number015002
Pages (from-to)015002-1 - 015002-20
Number of pages20
JournalPhysical Review D
Issue number1
Publication statusPublished - 1 Jan 2001
Externally publishedYes

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