The heterotic string at high temperature (or with strong supersymmetry breaking)

Details The heterotic string at high temperature (or with strong supersymmetry breaking) The heterotic string at high temperature (or with strong supersymmetry breaking)

2011-07-26

arxiv.org/abs/1107.5316v2

JHEP 1110:047,2011

Physics

High Energy Physics

High Energy Physics - Theory

22 pages; v2: minor corrections, references added

Scientific paper

10.1007/JHEP10(2011)047

Perturbative heterotic string theory develops a single complex tachyonic mode beyond the Hagedorn temperature. We calculate the quartic effective potential for this tachyonic mode at the critical temperature. Equivalently, we determine the quartic effective potential for strong supersymmetric breaking via anti-perdiodic boundary conditions for fermions on a small circle. We give many details of the heterotic tachyon scattering amplitudes, including a unitarity check to fix all normalization constants. We discuss difficulties in obtaining an effective action valid at all radii. We argue that in certain variables, the quartic term in the potential is radius independent. Speculations on the properties of a new strongly curved phase that could occur after tachyon condensation are offered.

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