A worldsheet for Kerr

DOI10.1007/JHEP03(2021)201zbMATH Open1461.83030arXiv2012.11570OpenAlexW3138138173MaRDI QIDQ2028360

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Publication date: 31 May 2021

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Abstract: We show that the Newman-Janis shift property of the exact Kerr solution can be interpreted in terms of a worldsheet effective action. This holds both in gravity, and for the single-copy $sqrtextKerr$ solution in electrodynamics. At the level of equations of motion, we show that the Newman-Janis shift holds also for the leading interactions of the Kerr black hole. These leading interactions are conveniently described using chiral classical equations of motion with the help of the spinor-helicity method familiar from scattering amplitudes.

Full work available at URL: https://arxiv.org/abs/2012.11570

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