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Paper   IPM / P / 8019
School of Physics
  Title:   Correlating μ Parameter and Right-Handed Neutrino Masses in N=1 Supergravity
1.  D.A. Demir
2.  Y. Farzan
  Status:   Published
  Journal: JHEP
  Vol.:  03
  Year:  2006
  Pages:   10
  Supported by:  IPM
In the context of minimal supersymmetric standard model that embeds the seesaw mechanism (MSSM-RN), superpotential contains two distinct mass scales: the μ parameter and the right-handed neutrino mass MN. To have a successful electroweak symmetry breaking, the μ parameter must be stabilized at the electroweak scale. On the other hand, to explain the small masses of the light neutrinos with relatively large Yukawa couplings, the right-handed neutrino masses should be much larger than the electroweak scale. In this work we attempt to construct a model by which both parameters are generated simultaneously. The model we build utilizes lepton number conservation and continuous R invariance as two fundamental global symmetries to forbid bare μ and MN appearing in the superpotential, and induces them at their right scales via spontaneous breakdown of the global symmetries and the supergravity. We discuss briefly certain phenomenological implications of the model.

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