ID: 2011.13446

4D Einstein-Gauss-Bonnet gravity: Massless particles and absorption of planar spin-0 waves

November 26, 2020

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Haroldo C. D. Lima Junior, Carolina L. Benone, Luís C. B. Crispino
General Relativity and Quant...

We investigate the absorption cross section of planar scalar massless waves impinging on spherically symmetric black holes which are solutions of the novel 4D Einstein-Gauss-Bonnet theory of gravity. Besides the mass of the black hole, the solution depends also on the Gauss-Bonnet constant coupling. Using the partial waves approach, we show that the absorption cross section depends on the Gauss-Bonnet coupling constant. Our numerical results present excellent agreement with the low- and high- frequency approximations, including the so-called sinc approximation.

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