11th Bologna Workshop on Conformal Field Theory and Integrable Models

Renormalized Angular Momentum Across Black Hole Perturbation Frameworks

4 Sept 2025, 15:35

25m

Aula Magna (Dept. of Physics and Astronomy - University of Bologna)

Talk (25 min) Talks

Speaker

Giorgio Di Russo (Hangzhou Institute for Advanced Study)

Description

The renormalized angular momentum appearing in the time-honored Mano–Suzuki–Takasugi (MST) method, which is useful for solving the confluent Heun equation as an infinite expansion of hypergeometric functions, is a fundamental quantity that arises in almost every black hole perturbation theory context, such as quasi-normal mode computations, tidal Love numbers, and waveforms. The appearance of this quantity is discussed both in the MST and in the Seiberg–Witten approaches, and some recent post-Minkowskian resummation properties in the eikonal regime are also examined.

Presentation materials

talk_Bologna.pdf