Remarks on the Racetrack Scheme

Details Remarks on the Racetrack Scheme Remarks on the Racetrack Scheme

1999-06-30

arxiv.org/abs/hep-th/9906246v5

Phys.Rev. D63 (2001) 046005

Physics

High Energy Physics

High Energy Physics - Theory

20 pp, latex, discussion of calculability modified

Scientific paper

10.1103/PhysRevD.63.046005

There are only a small number of ideas for stabilizing the moduli of string theory. One of the most appealing of these is the racetrack mechanism, in which a delicate interplay between two strongly interacting gauge groups fixes the value of the coupling constant. In this note, we explore this scenario. We find that quite generally, some number of discrete tunings are required in order that the mechanism yield a small gauge coupling. Even then, there is no sense in which a weak coupling approximation is valid. On the other hand, certain holomorphic quantities can be computed, so such a scheme is in principle predictive. Searching for models which realize this mechanism is thus of great interest. We also remark on cosmology in these schemes.

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