Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-05-02
Phys.Rev.D81:046005,2010
Physics
High Energy Physics
High Energy Physics - Theory
39 pages, v2: minor modification and clarifications
Scientific paper
10.1103/PhysRevD.81.046005
We extend the analysis of arXiv:0801.4457 [hep-th] to charged black hole solutions of four-dimensional $U(1)^4$ gauged supergravity which carry three charges. There are two decoupling near-horizon limits, one over the near-BPS black hole solution and the other over the near-extremal, but non-BPS geometry. Taking the limit over the eleven dimensional uplift of these black hole solutions, for both of these cases we obtain a geometry which has a piece (conformal) to rotating BTZ $\times S^2$. We study the 4d, $11d$ and $5d, 3d$ black hole properties. Moreover, we show that the BTZ$\times S^2$ geometry obtained after the near-BPS (near-extremal) limit is also a solution to five-dimensional $U(1)^3$ un-gauged (gauged) STU supergravity. Based on these decoupling limits we argue that there should be sectors of 3d CFT resulting from low energy limit of theory on $N$ M2-branes ($N\to \infty)$, which are decoupled from the rest of the theory and are effectively described by a 2d CFT. The central charge of the 2d CFT in both near-BPS and near-extremal case scales as $N$. The engineering dimension of the operators in these decoupled sectors scales as $N^{4/3}$ (for near-BPS case) while as $N^{3/2}$ (for the near-extremal case). Moreover, we discuss the description of the decoupled sectors as certain deformations of $6d$ CFT residing on the intersecting M5-brane giants.
Fareghbal Reza
Gowdigere Chethan N.
Mosaffa Amir Esmaeil
Sheikh-Jabbari Mohammad M.
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