Thermal Partition Functions for S-branes

Details Thermal Partition Functions for S-branes Thermal Partition Functions for S-branes

2003-07-03

arxiv.org/abs/hep-th/0307034v2

JHEP 0308 (2003) 008

Physics

High Energy Physics

High Energy Physics - Theory

33 pages, no figure; v2 typos corrected, a reference added

Scientific paper

10.1088/1126-6708/2003/08/008

We calculate the thermal partition functions of open strings on the S-brane backgrounds (the bouncing or rolling tachyon backgrounds) both in the bosonic and superstring cases. According to hep-th/0302146, we consider the discretized temperatures compatible with the pure imaginary periodicity of tachyon profiles. The ``effective Hagedorn divergence'' is shown to appear no matter how low temperature is chosen (including zero-temperature). This feature is likely to be consistent with the large rate of open string pair production discussed in hep-th/0209090 and also emission of closed string massive modes hep-th/0303139. We also discuss the possibility to remove the divergence by considering the space-like linear dilaton backgrounds as in hep-th/0306132.

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