On the thermodynamics of the black holes of the Cano-Ruipérez 4-dimensional string effective action
The Cano-Ruipérez 4-dimensional string effective action is the simplest consistent truncation of the first-order in α′ heterotic string effective action compactified on T6. This theory contains, on top of the metric, a dilaton and an axion that couple to the Gauss-Bonnet term and to the Pontrjagin d...
| Autores: | , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:dnet:digitalcsic_::d3c82f7a768667cc1943335912183381 |
| Acesso em linha: | http://hdl.handle.net/10261/429170 https://www.scopus.com/pages/publications/105007903396?origin=resultslist |
| Access Level: | acceso abierto |
| Palavra-chave: | Black Holes Black Holes in String Theory Classical Theories of Gravity |
| Resumo: | The Cano-Ruipérez 4-dimensional string effective action is the simplest consistent truncation of the first-order in α′ heterotic string effective action compactified on T6. This theory contains, on top of the metric, a dilaton and an axion that couple to the Gauss-Bonnet term and to the Pontrjagin density which suggests a very strong relation between the physical and geometrical properties of its solutions. In this paper we study the thermodynamics of the string black-hole solutions of this theory using Wald’s formalism. We construct the on-shell closed generalized Komar, dilaton and axion 2-form charges, and we used them to find the Smarr formula (that we test on the Schwarzschild and Kerr solutions) and to prove no-(primary)-hair theorems for the scalar. We find that α′ plays the role of a thermodynamical variable with an associated chemical potential. We also notice the occurrence of non-standard gravitational charges in the Wald entropy and scalar charges. © The Author(s) 2025. |
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