The first law of heterotic stringy black hole mechanics at zeroth order in α′
Dec 24, 2020
45 pages
Published in:
- JHEP 07 (2021) 007
- Published: Jul 5, 2021
e-Print:
- 2012.13323 [hep-th]
Report number:
- IFT-UAM/CSIC-20-181
View in:
Citations per year
Abstract: (Springer)
We prove the first law of black hole mechanics in the context of the Heterotic Superstring effective action compactified on a torus to leading order in α′, using Wald’s formalism, covariant Lie derivatives and momentum maps. The Kalb-Ramond field strength of this theory has Abelian Chern-Simons terms which induce Nicolai-Townsend transformations of the Kalb-Ramond field. We show how to deal with all these gauge symmetries deriving the first law in terms of manifestly gauge-invariant quantities. In presence of Chern-Simons terms, several definitions of the conserved charges exist, but the formalism picks up only one of them to play a role in the first law. We study explicitly a non-extremal, charged, black ring solution of pure = 1, d = 5 supergravity embedded in the Heterotic Superstring effective field theory.This work is a first step towards the derivation of the first law at first order in α′ where, more complicated, non-Abelian, Lorentz (“gravitational”) and Yang-Mills Chern-Simons terms are included in the Kalb-Ramond field strength. The derivation of a first law is a necessary step towards the derivation of a manifestly gauge-invariant entropy formula which is still lacking in the literature. In its turn, this entropy formula is needed to compare unambiguously macroscopic and microscopic black hole entropies.Note:
- A complete example in which the momentum maps of a non-extremal, charged, black ring are computed, has been added to the paper. 45 pages
- Black Holes in String Theory
- Classical Theories of Gravity
- Differential and Algebraic Geometry
- black hole: mechanics
- invariance: gauge
- black hole: entropy
- Chern-Simons term: abelian
- black hole: string
- charge: conservation law
- superstring: heterotic
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