Linear response, Hamiltonian, and radiative spinning two-body dynamics

Oct 12, 2022
23 pages
Published in:
  • Phys.Rev.D 107 (2023) 4, 044033
  • Published: Feb 15, 2023
e-Print:
DOI:
Report number:
  • HU-EP-22/32-RTG

Citations per year

2022202320242025627161
Abstract: (APS)
Using the spinning, supersymmetric worldline quantum field theory formalism we compute the momentum impulse and spin kick from a scattering of two spinning black holes or neutron stars up to quadratic order in spin at third post-Minkowskian (PM) order, including radiation-reaction effects and with arbitrarily misaligned spin directions. Parts of these observables, both conservative and radiative, are also inferred from lower-PM scattering data by extending Bini and Damour’s linear response formula to include misaligned spins. By solving Hamilton’s equations of motion we also use a conservative scattering angle to infer a complete 3PM two-body Hamiltonian including finite-size corrections and misaligned spin-spin interactions. Finally, we describe mappings to the bound two-body dynamics for aligned spin vectors: including a numerical plot of the binding energy for circular orbits compared with numerical relativity, analytic confirmation of the NNLO PN binding energy, and the energy loss over successive orbits.
Note:
  • 23 pages, 2 figures
  • spin: vector
  • correction: finite size
  • scattering
  • Hamiltonian
  • binding energy
  • orbit
  • conservation law
  • black hole
  • neutron star
  • field equations