Dynamical supersymmetry breaking in a superstring inspired model

Abstract

We present a dilaton dominated scenario for supersymmetry breaking in a recently constructed realistic superstring inspired model with an anomalous U(1) symmetry. Supersymmetry is broken via gaugino condensation due to a confining SU(Nc) gauge group in the hidden sector. In particular, we find that by imposing on the model the phenomenological constraint of the absence of observed flavor changing neutral currents, there is a range of parameters related to the hidden sector and the Kahler potential for which we obtain a low energy spectrum consistent with present experimental bounds. As an illustrative example, we derive the low energy spectrum of a specific model. We find that the LSP is the lightest neutralino with a mass of 53 GeV and the lightest Higgs has a mass of 104 GeV.Comment: 13 page

Neutrino mixing and the pattern of supersymmetry breaking

“…Depending on the family symmetry, such models can also explain the magnitude of the observed baryon asymmetry [7]. The expected phenomenology of neutrino oscillations depends on details of the model [8,9].…”

Neutrino masses and mixing with non-anomalous abelian flavor symmetries

“…We note, however, that it is not impossible that, if the solar neutrino problem is a result of the MSW mechanism, the ratio between ∆m 2 SN and ∆m 2 AN is accidentally, rather than parametrically, suppressed [10][11][12][13]. Then, the analysis of this work and of ref.…”

Matter-antimatter asymmetry of the universe

“…The masses of the two eigenstates ν 2 and ν 3 depend on unspecified factors of order one, and may differ by an order of magnitude [33,34]. They can therefore be consistent with the mass differences ∆m 2 ν1ν2 4 · 10 −6 − 1 · 10 −5 eV 2 [35] inferred from the MSW solution of the solar neutrino problem [36] and ∆m 2 ν2ν3 (5 · 10 −4 − 6 · 10 −3 ) eV 2 associated with the atmospheric neutrino deficit [27].…”