4D Einstein-Gauss-Bonnet gravity: Massless particles and absorption of planar spin-0 waves
Haroldo C. D. Lima, Carolina L. Benone, Luís C. B. Crispino
Abstract
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.
Topics & Concepts
Massless particlePhysicsAbsorption cross sectionPlanarCoupling constantEinsteinScalar (mathematics)Quantum electrodynamicsGauss–Bonnet theoremAbsorption (acoustics)GaussCross section (physics)Quantum mechanicsMathematical physicsGeometryOpticsMathematicsComputer graphics (images)Computer sciencePulsars and Gravitational Waves ResearchAstrophysical Phenomena and ObservationsBlack Holes and Theoretical Physics