# Entropy and temperature of black 3-branes.

@article{Gubser1996EntropyAT, title={Entropy and temperature of black 3-branes.}, author={Gubser and Klebanov and Peet}, journal={Physical review. D, Particles and fields}, year={1996}, volume={54 6}, pages={ 3915-3919 } }

We consider slightly nonextremal black 3-branes of type IIB supergravity and show that their Bekenstein-Hawking entropy agrees, up to a mysterious factor, with an entropy derived by counting non-BPS excitations of the Dirichlet 3-brane. These excitations are described in terms of the statistical mechanics of a (3+1)-dimensional gas of massless open string states. This is essentially the classic problem of blackbody radiation. The blackbody temperature is related to the temperature of the…

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A similar mismatch in the entropy normalizations was also found by A. Strominger, private communication

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