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arXiv · hep-th/9610074

Black hole entropy reveals a 12th "dimension"

Itzhak Bars
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Abstract

The Beckenstein-Hawking black hole entropy in string theory and its extensions, as expressed in terms of charges that correspond to central extensions of the supersymmetry algebra, has more symmetries than U-duality. It is invariant under transformations of the charges, involving a 12th (or 13th) ``dimension''. This is an indication that the secret theory behind string theory has a superalgebra involving Lorentz non-scalar extensions (that are not strictly central), as suggested in S-theory, and which could be hidden in M- or F- theories. It is suggested that the idea of spacetime is broader than usual, and that a larger ``spacetime" is partially present in black holes.

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Itzhak Bars. 1996-10-14. Black hole entropy reveals a 12th "dimension". https://doi.org/10.1103/physrevd.55.3633

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