## Abstract

Specific models of supersymmetry breaking predict relations between the trilinear and bilinear soft supersymmetry breaking parameters A_{0} and B_{0} at the input scale. In such models, the value of tan β can be calculated as a function of the scalar masses mo and the gaugino masses m_{1/2}, which we assume to be universal. The experimental constraints on sparticle and Higgs masses, b → sγ decay and the cold dark matter density Ω_{CDM}h^{2} can then be used to constrain tan β in such specific models of supersymmetry breaking. In the simplest Polonyi model with A_{0} = (3 - √3)m_{0} = B_{0} + m_{0}, we find 11 ≲ tan β 20 (tan β ≃ 4.15) for μ > 0 (μ < 0). We also discuss other models with A_{0} = B_{0} + m_{0}, finding that only the range -1.9 ≲ A _{0}/m_{0} ≲ 2.5 is allowed for μ > 0, and the range 1.25 ≲ A_{0}/m_{0} ≲ 4.8 for μ < 0. In these models, we find no solutions in the rapid-annihilation 'funnels' or in the 'focus-point' region. We also discuss the allowed range of tanβ in the no-scale model with A_{0} = B_{0} = 0. In all these models, most of the allowed regions are in the x - τ̃_{1} coannihilation 'tail'.

Original language | English (US) |
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Pages (from-to) | 162-172 |

Number of pages | 11 |

Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |

Volume | 573 |

Issue number | 1-4 |

DOIs | |

State | Published - Oct 30 2003 |

### Bibliographical note

Funding Information:The work of K.A.O., Y.S., and V.C.S. was supported in part by DOE grant DE-FG02-94ER-40823.