The μ- term in Effective Supergravity Theories

Details The μ- term in Effective Supergravity Theories The μ- term in Effective Supergravity Theories

1996-11-06

arxiv.org/abs/hep-th/9611035v2

Phys.Lett. B394 (1997) 323-328

Physics

High Energy Physics

High Energy Physics - Theory

LateX file, 10pages, no figures. Version to appear in Phys. Lett.B

Scientific paper

10.1016/S0370-2693(97)00021-X

The Higgs mixing term coefficient $\mu_{eff}$ is calculated in the scalar potential in supergravity theories with string origin, in a model independent approach. A general low energy effective expression is derived, where new contributions are included which depend on the modular weights $q_{1,2}$ of the Higgs superfields, the moduli and derivative terms. We find that in a class of models obtained in the case of compactifications of the heterotic superstring, the derivative terms are identically zero. Further, the total $\mu_{eff}$-term vanishes identically if the sum of the two modular weights $q_1+q_2$ is equal to two. Subleading $\mu$- corrections, in the presence of intermediate gauge symmetries predicted in viable string scenarios, are also discussed.

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