Sep 9 – 13, 2019
Europe/Zurich timezone

Orbital dynamics from the double copy and effective field theory

Sep 11, 2019, 11:30 AM
25m
Chambre du Trésorier

Chambre du Trésorier

Speaker

Mao Zeng (UC Los Angeles)

Description

We compute the third-post-Minkowskian conservative Hamiltonian of binary black holes using modern tools from scattering amplitudes and effective field theory. In the limit of large separation, non-spinning black holes have an effective description in terms scalar field particles coupled to gravity. The two-loop integrand is constructed using generalized unitarity and the double copy construction. We perform loop integration by expanding around zero velocity to high orders, using techniques borrowed from NRQCD, before matching the series to known functions. For some diagrams, we also validate the results using the method of differential equations. We comment on spurious collinear singularities that arise from the truncation of the quantum amplitude to the classical limit.

Primary author

Mao Zeng (UC Los Angeles)

Co-authors

Prof. Zvi Bern (UCLA) Prof. Clifford Cheung (Caltech) Radu Roiban (Penn State) Dr Chia-Hsien Shen (UCLA) Dr Mikhail P. Solon (Caltech)

Presentation materials