On the stability of the primordial closed string gas

Details On the stability of the primordial closed string gas On the stability of the primordial closed string gas

2005-07-08

arxiv.org/abs/hep-th/0507088v4

JHEP 0601 (2006) 059

Physics

High Energy Physics

High Energy Physics - Theory

20 pages and 1 figure. The final version that appeared in JHEP

Scientific paper

10.1088/1126-6708/2006/01/059

We recast the study of a closed string gas in a toroidal container in the physical situation in which the single string density of states is independent of the volume because energy density is very high. This includes the gas for the well known Brandenberger-Vafa cosmological scenario. We describe the gas in the grandcanonical and microcanonical ensembles. In the microcanonical description, we find a result that clearly confronts the Brandenberger-Vafa calculation to get the specific heat of the system. The important point is that we use the same approach to the problem but a different regularization. By the way, we show that, in the complex temperature formalism, at the Hagedorn singularity, the analytic structure obtained from the so-called F-representation of the free energy coincides with the one computed using the S-representation.

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