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The phenomenological implications of the eleven dimensional limit of M-theory (strongly coupled E 8 × E 8) are investigated. In particular we calculate the supersymmetric spectrum subject to constraints of correct electroweak symmetry breaking and the requirement that the lighest supersymmetric particle provides the dark matter of the universe. The B-soft(More)
We construct a new set of intersecting D4-brane models that yield the (non-supersym-metric) standard model up to vector-like matter and, in some cases, extra U(1) factors in the gauge group. The models are constrained by the requirement that twisted tadpoles cancel, and that the gauge boson coupled to the weak hypercharge U(1) Y does not get a string-scale(More)
The moduli dependence of string loop threshold corrections to gauge coupling constants is investigated for those Z N Coxeter orbifolds with the property that some twisted sectors have fixed planes for which the six-torus T 6 can not be decomposed into a direct sum T 4 T 2 with the fixed plane lying in T 2. It is a remarkable feature of the extrapolation [1](More)
The possibility of spontaneous breaking of CP symmetry by the expectation values of orbifold moduli is investigated with particular reference to CP violating phases in soft supersymmetry breaking terms. The effect of different mechanisms for stabilizing the dilaton and the form of the non-perturbative superpotential on the existence and size of these phases(More)
The phenomenological implications of the eleven dimensional limit of M-theory (strongly coupled E 8 ×E 8) are investigated. In particular we calculate the supersymmetric particle spectrum subject to constraints of correct electroweak symmetry breaking and the requirement that the lightest supersymmetric particle provides the dark matter of the universe. We(More)