### Near-horizon brane-scan revived

, 804

"... In 1987 two versions of the brane-scan of D-dimensional super p-branes were put forward. The first pinpointed those (p,D) slots consistent with kappa-symmetric Green-Schwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describin ..."

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In 1987 two versions of the brane-scan of D-dimensional super p-branes were put forward. The first pinpointed those (p,D) slots consistent with kappa-symmetric Green-Schwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describing p-branes on the boundary of AdSp+2 ×SD−p−2. Although the second version predicted D3 and M5 branes in addition to those of the first, it came unstuck because the 1/2 BPS solitonic branes failed to exhibit the required symmetry enhancement in the near-horizon limit, except in the non-dilatonic cases (p = 2,D = 11), (p = 3,D = 10) and (p = 5,D = 11). Just recently, however, it has been argued that the fundamental D = 10 heterotic string does indeed display a near-horizon enhancement to OSp(8|2) as predicted by the brane-scan, provided α ′ corrections are taken into account. If this logic could be extended to the other strings and branes, it would resolve this 21-year-old paradox and provide new AdS/CFT dualities.

### unknown title

, 807

"... Preprint typeset in JHEP style- HYPER VERSION Corrections to the statistical entropy of five dimensional black holes ..."

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Preprint typeset in JHEP style- HYPER VERSION Corrections to the statistical entropy of five dimensional black holes

### unknown title

, 807

"... Preprint typeset in JHEP style- HYPER VERSION Corrections to the statistical entropy of five dimensional black holes ..."

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Preprint typeset in JHEP style- HYPER VERSION Corrections to the statistical entropy of five dimensional black holes

### On 5D Small Black Holes

, 712

"... Using higher order corrections we argue that five dimensional N = 2 and N = 4 small back holes exhibit supersymmetry enhancement in near horizon geometry leading to eight and sixteen supercharges, respectively. Using this enhancement at supergravity level we can identify the global supergroup of the ..."

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Using higher order corrections we argue that five dimensional N = 2 and N = 4 small back holes exhibit supersymmetry enhancement in near horizon geometry leading to eight and sixteen supercharges, respectively. Using this enhancement at supergravity level we can identify the global supergroup of the near horizon geometry. In particular we show how this supergroup In this paper we study symmetry of the near horizon geometry of the extremal black holes in N = 2 and 4 supergravities in five dimensions. The corresponding black holes could be either small or large depending on whether the corresponding classical horizon area is zero or non-zero, respectively. In the N = 2 case both small and

### bInstitute for Theoretical Physics and Spinoza Institute,

"... A comprehensive analysis is presented based exclusively on near-horizon data to determine the attractor equations and the entropy of BPS black holes and rings in five space-time dimensions, for a Lagrangian invariant under eight supersym-metries with higher-derivative couplings. For spinning black h ..."

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A comprehensive analysis is presented based exclusively on near-horizon data to determine the attractor equations and the entropy of BPS black holes and rings in five space-time dimensions, for a Lagrangian invariant under eight supersym-metries with higher-derivative couplings. For spinning black holes the results only partially agree with the results of previous work, where often additional input was used beyond the near-horizon behaviour. A number of discrepancies remains, for example, pertaining to small black holes and to large spinning black holes, which are related to the presence of the higher-derivative couplings. Arguments are pre-sented to explain some of them. For the black rings, the analysis is intricate due to the presence of Chern-Simons terms and due to the fact that the gauge fields are not globally defined. The contributions from the higher-derivative couplings take a systematic form in line with expectations based on a variety of arguments. ar X iv