Kerr Black Hole Worldline Action at Infinite Spin Orders
Analysis
Key Takeaways
- •Develops a worldline action for Kerr black holes at infinite spin orders.
- •Matches to a tree-level Kerr Compton amplitude.
- •Analyzes the role of quadratic-in-Riemann operators in the action.
- •Discusses the same- and opposite-helicity sectors and their implications.
“The paper argues that in the same-helicity sector the $R^2$ operators have no intrinsic meaning, as they merely remove unwanted terms produced by the linear-in-Riemann operators.”