N3LO gravitational quadratic-in-spin interactions at G 4

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

Dokumenter

  • Fulltext

    Forlagets udgivne version, 782 KB, PDF-dokument

We compute the N3LO gravitational quadratic-in-spin interactions at G4 in the post-Newtonian (PN) expansion via the effective field theory (EFT) of gravitating spinning objects for the first time. This result contributes at the 5PN order for maximally-spinning compact objects, adding the spinning case to the static sector at this PN accuracy. This sector requires extending the EFT of a spinning particle beyond linear order in the curvature to include higher-order operators quadratic in the curvature that are relevant at this PN order. We make use of a diagrammatic expansion in the worldline picture, and rely on our recent upgrade of the EFTofPNG code, which we further extend to handle this sector. Similar to the spin-orbit sector, we find that the contributing three-loop graphs give rise to divergences, logarithms, and transcendental numbers. However, in this sector all of these features conspire to cancel out from the final result, which contains only finite rational terms.

OriginalsprogEngelsk
Artikelnummer116
TidsskriftJournal of High Energy Physics
Vol/bind2021
Udgave nummer7
Antal sider18
ISSN1126-6708
DOI
StatusUdgivet - jul. 2021

Bibliografisk note

Publisher Copyright:
© 2021, The Author(s).

ID: 307090414