Extremality Versus Supersymmetry in Stringy Black Holes

We study general black-hole solutions of the low-energy string effective action in arbitrary dimensions using a general metric that can describe them all in a unified way both in the extreme and non-extreme cases. We calculate the mass, temperature and entropy and study which relations amongst the c...

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Autor principal: Ortin, Tomas
Lenguaje:eng
Publicado: 1996
Materias:
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(98)00040-9
http://cds.cern.ch/record/316804
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author Ortin, Tomas
author_facet Ortin, Tomas
author_sort Ortin, Tomas
collection CERN
description We study general black-hole solutions of the low-energy string effective action in arbitrary dimensions using a general metric that can describe them all in a unified way both in the extreme and non-extreme cases. We calculate the mass, temperature and entropy and study which relations amongst the charges and the mass lead to extremality. We find that the temperature always vanishes in the extreme limit and we find that, for a set of n charges (no further reducible by duality) there are 2^(n-1) combinations of the charges that imply extremality. Not all of these combinations can be central charge eigenvalues and, thus, there are in general extreme black holes which are not supersymmetric (or ``BPS-saturated''). In the N=8 supergravity case we argue that the existence of roughly as many supersymmetric and non-supersymmetric extreme black holes suggests the existence of an underlying twelve-dimensional structure.
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institution Organización Europea para la Investigación Nuclear
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spelling cern-3168042023-03-14T17:12:26Zdoi:10.1016/S0370-2693(98)00040-9http://cds.cern.ch/record/316804engOrtin, TomasExtremality Versus Supersymmetry in Stringy Black HolesParticle Physics - TheoryWe study general black-hole solutions of the low-energy string effective action in arbitrary dimensions using a general metric that can describe them all in a unified way both in the extreme and non-extreme cases. We calculate the mass, temperature and entropy and study which relations amongst the charges and the mass lead to extremality. We find that the temperature always vanishes in the extreme limit and we find that, for a set of n charges (no further reducible by duality) there are 2^(n-1) combinations of the charges that imply extremality. Not all of these combinations can be central charge eigenvalues and, thus, there are in general extreme black holes which are not supersymmetric (or ``BPS-saturated''). In the N=8 supergravity case we argue that the existence of roughly as many supersymmetric and non-supersymmetric extreme black holes suggests the existence of an underlying twelve-dimensional structure.We study general black-hole solutions of the low-energy string effective action in arbitrary dimensions using a general metric that can describe them all in a unified way both in the extreme and non-extreme cases. We calculate the mass, temperature and entropy and study which relations amongst the charges and the mass lead to extremality. We find that the temperature always vanishes in the extreme limit and we find that, for a set of n charges (no further reducible by duality) there are 2 ( n −1) combinations of the charges that imply extremality. Not all of these combinations can be central charge eigenvalues and, thus, there are in general extreme black holes which are not supersymmetric (or “BPS-saturated”). In the N =8 supergravity case we argue that the existence of roughly as many supersymmetric and non-supersymmetric extreme black holes suggests the existence of an underlying twelve-dimensional structure.We study general black-hole solutions of the low-energy string effective action in arbitrary dimensions using a general metric that can describe them all in a unified way both in the extreme and non-extreme cases. We calculate the mass, temperature and entropy and study which relations amongst the charges and the mass lead to extremality. We find that the temperature always vanishes in the extreme limit and we find that, for a set of n charges (no further reducible by duality) there are 2^{(n-1)} combinations of the charges that imply extremality. Not all of these combinations can be central charge eigenvalues and, thus, there are in general extreme black holes which are not supersymmetric (or ``BPS-saturated''). In the N=8 supergravity case we argue that the existence of roughly as many supersymmetric and non-supersymmetric extreme black holes suggests the existence of an underlying twelve-dimensional structure.hep-th/9612142CERN-TH-96-357CERN-TH-96-357oai:cds.cern.ch:3168041996-12-12
spellingShingle Particle Physics - Theory
Ortin, Tomas
Extremality Versus Supersymmetry in Stringy Black Holes
title Extremality Versus Supersymmetry in Stringy Black Holes
title_full Extremality Versus Supersymmetry in Stringy Black Holes
title_fullStr Extremality Versus Supersymmetry in Stringy Black Holes
title_full_unstemmed Extremality Versus Supersymmetry in Stringy Black Holes
title_short Extremality Versus Supersymmetry in Stringy Black Holes
title_sort extremality versus supersymmetry in stringy black holes
topic Particle Physics - Theory
url https://dx.doi.org/10.1016/S0370-2693(98)00040-9
http://cds.cern.ch/record/316804
work_keys_str_mv AT ortintomas extremalityversussupersymmetryinstringyblackholes