Solving the decompactification problem in string theory

doi:10.1016/0370-2693(96)00880-5

Solving the decompactification problem in string theory

1996-09-01

46

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P. Marios Petropoulos

J

J. Rizos

DOI：10.1016/0370-2693(96)00880-5

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We investigate heterotic ground states in four dimensions in which N = 4 supersymmetry is spontaneously broken to N = 2. The N = 4 supersymmetry is restored at a decompactification limit corresponding to m(3/2) --> 0. We calculate the full moduli-dependent threshold corrections and confirm that they are suppressed in the decompactification limit, as expected from the restoration of N = 4 supersymmetry. This should be contrasted with the behaviour of the standard N = 2 ground states, where the couplings blow up linearly with the volume of the decompactifying manifold. This mechanism provides a solution to the decompactification problem for the gauge coupling constants. We also discuss how the mechanism can be implemented in ground states with lower supersymmetry.

Keywords:

GAUGE COUPLINGS

THRESHOLD CORRECTIONS

GRAVITATIONAL COUPLINGS

SUPERSTRING MODELS

MODULI CORRECTIONS

LOOP CORRECTIONS

SUPERGRAVITY

COMPACTIFICATIONS

SUPERSYMMETRY

CONDENSATION

Solving the decompactification problem in string theory

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