Thermal Partition Functions for S-branes

Abstract

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.

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

References in corpus (5)

• D-brane Decay in Two-Dimensional String Theory
• SD-brane gravity fields and rolling tachyons
• Rolling of Modulated Tachyon with Gauge Flux and Emergent Fundamental String
• The Rolling Tachyon as a Matrix Model
• Comments on Supergravity Description of S-branes

Cited by in corpus (7)

• Tachyon Dynamics in Open String Theory
• Modular Bootstrap for Boundary N=2 Liouville Theory
• Comments on Half S-Branes
• D-Brane Propagation in Two-Dimensional Black Hole Geometries
• D-branes in T-fold conformal field theory
• Note on D-Brane Effective Action in the Linear Dilaton Background
• Closed String Emission from Unstable D-brane with Background Electric Field