Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 7, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP07(2010)022
Keywords
Classical Theories of Gravity; Black Holes
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Funding
- Belgian FNRS
- Alexander von Humboldt Foundation
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We construct uniform black string solutions in Einstein-Gauss-Bonnet gravity for all dimensions d between five and ten and discuss their basic properties. Closed form solutions are found by taking the Gauss-Bonnet term as a perturbation from pure Einstein gravity. Nonperturbative solutions are constructed by solving numerically the equations of the model. The Gregory-Laflamme instability of the black strings is explored via linearized perturbation theory. Our results indicate that new qualitative features occur for d = 6, in which case stable, infinitely long black strings exist for large enough values of the Gauss-Bonnet coupling constant. For other dimensions, the black strings are dynamically unstable and have also a negative specific heat. We argue that this provides an explicit realization of the Gubser-Mitra conjecture, which links local dynamical and thermodynamic stability. Non-uniform black strings in Einstein-Gauss-Bonnet theory are also constructed in six spacetime dimensions.
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