The One Loop Effective Potential and Supersymmetry Breaking in Superstring Models

Coughlan, G.D.; German, G.; Ross, Graham G.; Segre, G.

doi:10.1016/0370-2693(87)90901-4

The One Loop Effective Potential and Supersymmetry Breaking in Superstring Models

Oct 29, 1987

18 pages

Published in:

Phys.Lett.B 198 (1987) 467

DOI:

10.1016/0370-2693(87)90901-4

Report number:

OXFORD-TP-53-87

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Abstract: (Elsevier)

The effective four-dimensional field theory arising from the superstring is studied in detail. Two schemes, which differ in the dynamics of the superpotential, are presented in which the one-loop effective potential is well-behaved and possesses a global minimum for finite values of the fields. The supersymmetry-breaking gaugino and scalar masses are calculated and can be hierarchically smaller than the compactification scale. Furthermore, this hierarchy may become large when the cosmological constant is adjusted (by a single fine-tuning) to zero. This suggests an intimate relationship between the origin of the hierarchy and the vanishing of the cosmological constant.

MODEL: STRING
SUPERSYMMETRY: SYMMETRY BREAKING
FIELD THEORY: EFFECTIVE ACTION
APPROXIMATION: EFFECTIVE POTENTIAL
PERTURBATION THEORY: HIGHER-ORDER
GAUGE FIELD THEORY: HIERARCHY PROBLEM
COSMOLOGICAL CONSTANT
MASS SPECTRUM
NUMERICAL CALCULATIONS

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