2026/07/16 by Donato Bini, Giorgio Di Russo
#gr-qc
We compute the massive particles radial action along hyperboliclike geodesics in various spherically symmetric spacetimes: the standard 4d Schwarzschild spacetime, its d-dimensional genralization known as Schwarzschild-Tangherlini solutions and for the D3-branes spacetimes, showing useful resummation properties in terms of special (hypergeometric, Fox-Wright) functions in the eikonal limit and generalizing previous results valid for null geodesics. As a consequence, the scattering angle can be resummed too, and we explicitly display the resummed expressions. In addition, in the more interesting situation of a 4d Schwarzschild black hole spacetime, following the approach of the quantum Seiberg-Witten curves to the radial equation associated with a massive scalar field, we show that the quantum a-cycle (or, equivalently, the \lq\lq renormalized angular momentum") is simply related to radial action also in this massive case, providing fully resummed expressions. Finally, we display the explicit, expanded-form expression of the dual aD-cycle, for which, however, no resummed expressions have been derived yet.