Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-09-16
Phys.Lett. B444 (1998) 61-67
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX, 14 pages
Scientific paper
10.1016/S0370-2693(98)01310-0
We present a model in which the same modulus field breaks both SUSY and a simple GUT gauge group down to the SM gauge group. The modulus is stabilized by the inverted hierarchy mechanism in a perturbative region so that the model is calculable. This is the first example of this kind in the literature. All mass scales (other than the Planck scale) are generated dynamically. In one of the models doublet-triplet splitting is achieved naturally by the sliding singlet mechanism while another model requires fine tuning. The gauge mediation contribution to the right handed slepton (mass)$^2$ is negative. But, for the modulus vacuum expectation value close to the GUT scale, the supergravity contribution to the slepton (mass)$^2$ is comparable to the gauge mediation contribution and thus a realistic spectrum can be attained.
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