Supersymmetry and finite-temperature strings

Details Supersymmetry and finite-temperature strings Supersymmetry and finite-temperature strings

2000-11-22

arxiv.org/abs/hep-th/0011203v1

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, Latex, To appear in the proceedings of The Ninth Marcel Grossmann Meeting, Rome, July 2-8, 2000

Scientific paper

We describe finite temperature N=4 superstrings in D=5 by an effective four-dimensional supergravity of the thermal winding modes that can become tachyonic and trigger the instabilities at the Hagedorn temperature. Using a domain-wall ansatz, exact solutions to special BPS-type first order equations are found. They preserve half of the supersymmetries, contrary to the standard perturbative superstring at finite temperature that breaks all supersymmetries. Our solutions show no indication of any tachyonic instability and provide evidence for a new BPS phase of finite temperature superstrings that is stable for all temperatures. This would have important consequences for a stringy description of the early universe.

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