Astrophysical and cosmological considerations on a string dilaton of a least coupling
arXiv:hep-ph/9506362 · doi:10.1016/0927-6505(96)00010-2
Abstract
String-loop effects may generate very weak matter couplings for a (massless) dilaton. We examine limits on the shift of such a dilaton toward its present equilibrium value from big-bang nucleosynthesis and the binary pulsar. On the other hand, the approach of the dilaton toward its present value can be realized in the early universe in a quick and efficient way if an inflationary period is present. We comment briefly on some implications.
Revised version to appear in Astropart.Phys., numerical correction of the binary pulsar constraint. 18 pages, latex
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