Astrophysical and cosmological considerations on a string dilaton of a least coupling

Details Astrophysical and cosmological considerations on a string dilaton of a least coupling Astrophysical and cosmological considerations on a string dilaton of a least coupling

1995-06-19

arxiv.org/abs/hep-ph/9506362v2

Astropart.Phys.5:221-230,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revised version to appear in Astropart.Phys., numerical correction of the binary pulsar constraint. 18 pages, latex

Scientific paper

10.1016/0927-6505(96)00010-2

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.

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