Abstract
The global phase structure for heterotic string theory is studied. Three different types of representations for thermo-partition functions are provided. We show how modular invariance arises and analyze finite-temperature divergences. A three-phase structure, involving a new nonperturbative high-temperature phase, for the heterotic string is found. The transition into this new phase takes place at β=π/T, where is the conventional ‘‘Hagedorn temperature’’ for the heterotic string.
- Received 18 March 1987
DOI:https://doi.org/10.1103/PhysRevD.36.1184
©1987 American Physical Society