Specific models of supersymmetry breaking predict relations between the trilinear and bilinear soft supersymmetry breaking parameters A0 and B0 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 m1/2, which we assume to be universal. The experimental constraints on sparticle and Higgs masses, b → sγ decay and the cold dark matter density ΩCDMh2 can then be used to constrain tan β in such specific models of supersymmetry breaking. In the simplest Polonyi model with A0 = (3 - √3)m0 = B0 + m0, we find 11 ≲ tan β 20 (tan β ≃ 4.15) for μ > 0 (μ < 0). We also discuss other models with A0 = B0 + m0, finding that only the range -1.9 ≲ A 0/m0 ≲ 2.5 is allowed for μ > 0, and the range 1.25 ≲ A0/m0 ≲ 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 A0 = B0 = 0. In all these models, most of the allowed regions are in the x - τ̃1 coannihilation 'tail'.
|Original language||English (US)|
|Number of pages||11|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Oct 30 2003|
Bibliographical noteFunding Information:
The work of K.A.O., Y.S., and V.C.S. was supported in part by DOE grant DE-FG02-94ER-40823.