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**Harvard**

Gran, U., Gutowski, J. och Papadopoulos, G. (2011) *IIB black hole horizons with five-form flux and KT geometry*.

** BibTeX **

@article{

Gran2011,

author={Gran, Ulf and Gutowski, J. and Papadopoulos, G.},

title={IIB black hole horizons with five-form flux and KT geometry},

journal={Journal of High Energy Physics},

issn={1029-8479},

issue={5},

abstract={We investigate the near horizon geometry of IIB supergravity black holes with non-vanishing 5-form flux preserving at least two supersymmetries. We demonstrate that there are three classes of solutions distinguished by the choice of Killing spinors. We find that the spatial horizon sections of the class of solutions with an SU(4) invariant pure Killing spinor are hermitian manifolds and admit a hidden Kahler with torsion (KT) geometry compatible with the SU(4) structure. Moreover the Bianchi identity of the 5-form, which also implies the field equations, can be expressed in terms of the torsion H as d(omega boolean AND H) = partial derivative partial derivative omega(2) = 0, where omega is a Hermitian form. We give several examples of near horizon geometries which include group manifolds, group fibrations over KT manifolds and uplifted geometries of lower dimensional black holes. Furthermore, we show that the class of solutions associated with a Spin(7) invariant spinor is locally a product R-1,R-1 x S, where S is a holonomy Spin(7) manifold.},

year={2011},

keywords={Black Holes in String Theory, Supergravity Models, supersymmetric sigma-models, spinorial geometry, string backgrounds, d=10 supergravity, manifolds, torsion, theorem, uniqueness, spaces, n=2 },

}

** RefWorks **

RT Journal Article

SR Electronic

ID 143860

A1 Gran, Ulf

A1 Gutowski, J.

A1 Papadopoulos, G.

T1 IIB black hole horizons with five-form flux and KT geometry

YR 2011

JF Journal of High Energy Physics

SN 1029-8479

IS 5

AB We investigate the near horizon geometry of IIB supergravity black holes with non-vanishing 5-form flux preserving at least two supersymmetries. We demonstrate that there are three classes of solutions distinguished by the choice of Killing spinors. We find that the spatial horizon sections of the class of solutions with an SU(4) invariant pure Killing spinor are hermitian manifolds and admit a hidden Kahler with torsion (KT) geometry compatible with the SU(4) structure. Moreover the Bianchi identity of the 5-form, which also implies the field equations, can be expressed in terms of the torsion H as d(omega boolean AND H) = partial derivative partial derivative omega(2) = 0, where omega is a Hermitian form. We give several examples of near horizon geometries which include group manifolds, group fibrations over KT manifolds and uplifted geometries of lower dimensional black holes. Furthermore, we show that the class of solutions associated with a Spin(7) invariant spinor is locally a product R-1,R-1 x S, where S is a holonomy Spin(7) manifold.

LA eng

DO 10.1007/jhep05(2011)050

LK http://dx.doi.org/10.1007/jhep05(2011)050

OL 30