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Conference Paper

Birth of hot big-bang era in pre-big bang string cosmology


Buonanno,  Alessandra
Institut d’Astrophysique de Paris (CNRS);
Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Buonanno, A. (2002). Birth of hot big-bang era in pre-big bang string cosmology. In Proceedings of the Ninth Marcel Grossmann Meeting on General Relativity: MGIX (pp. 1231-1232). World Scientific.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-E2E9-C
We investigate the reheating process in pre-big-bang string cosmology estimating the amount of moduli and gravitinos produced gravitationally and in scattering processes of the thermal bath. We find that those abundances always exceed the limit imposed by big-bang nucleosynthesis and we point out various mechanisms which provide the entropy necessary to dilute those dangerous relics. This entropy production can be viewed as the birth of the hot big-bang era in pre-big-bang string cosmology.