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arXiv · 1211.7296

The Freudenthal gauge symmetry of the black holes of N=2,d=4 supergravity

Pietro Galli·Patrick Meessen·Tomas Ortin
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Abstract

We show that the representation of black-hole solutions in terms of the variables H^M which are harmonic functions in the supersymmetric case is non-unique due to the existence of a local symmetry in the effective action. This symmetry is a continuous (and local) generalization of the discrete Freudenthal transformations initially introduced for the black-hole charges and can be used to rewrite the physical fields of a solution in terms of entirely different-looking functions.

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Pietro Galli, Patrick Meessen, Tomas Ortin. 2012-11-30. The Freudenthal gauge symmetry of the black holes of N=2,d=4 supergravity. https://doi.org/10.1007/jhep05(2013)011

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