Small SUSY phases in string-inspired supergravity

Details Small SUSY phases in string-inspired supergravity Small SUSY phases in string-inspired supergravity

1993-11-24

arxiv.org/abs/hep-ph/9311352v1

Phys.Rev.Lett.72:1592-1595,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

15pages, Latex, SNUTP 93-85

Scientific paper

10.1103/PhysRevLett.72.1592

In supersymmetric models, there are new CP violating phases which, if unsuppressed, would give a too large neutron electric dipole moment. We examine the possibility of small SUSY phases in string-inspired supergravity models in which supersymmetry is broken by the auxiliary components of the dilaton and moduli superfields. It is found that the SUSY phases can be suppressed by a small factor governing the breakdown of the approximate Peccei Quinn symmetries nonlinearly realized for the moduli superfields that participate in supersymmetry breaking. In many cases, the symmetry breaking factors are exponentially small for moderately large values of the moduli, leading to small phase values in a natural way.

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