Relaxed Bounds on the Dilaton Mass in a String Cosmology Scenario

Details Relaxed Bounds on the Dilaton Mass in a String Cosmology Scenario Relaxed Bounds on the Dilaton Mass in a String Cosmology Scenario

1994-01-25

arxiv.org/abs/gr-qc/9401026v1

Phys.Lett. B327 (1994) 214-220

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, plain tex, 2 figures (available on request) DFTT-03/94

Scientific paper

10.1016/0370-2693(94)90720-X

We discuss bounds on the dilaton mass, following from the cosmological amplification of the quantum fluctuations of the dilaton background, under the assumption that such fluctuations are dominant with respect to the classical background oscillations. We show that if the fluctuation spectrum grows with the frequency the bounds are relaxed with respect to the more conventional case of a flat or decreasing spectrum. As a consequence, the allowed range of masses may become compatible with models of supersymmetry breaking, and with a universe presently dominated by a relic background of dilaton dark matter.

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