On-shell heavy particle effective theories

A bstract We introduce on-shell variables for Heavy Particle Effective Theories (HPETs) with the goal of extending Heavy Black Hole Effective Theory to higher spins and of facilitating its application to higher post-Minkowskian orders. These variables inherit the separation of spinless and spin-incl...

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Bibliographic Details
Published in:The journal of high energy physics 2020-05, Vol.2020 (5), p.1-44, Article 51
Main Authors: Aoude, Rafael, Haddad, Kays, Helset, Andreas
Format: Article
Language:English
Subjects:
Amplitudes
Black Holes
Bosons
Classical and Quantum Gravitation
Effective Field Theories
Elementary Particles
Helicity
High energy physics
Multipoles
Particle spin
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
Scattering Amplitudes
String Theory
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Summary:A bstract We introduce on-shell variables for Heavy Particle Effective Theories (HPETs) with the goal of extending Heavy Black Hole Effective Theory to higher spins and of facilitating its application to higher post-Minkowskian orders. These variables inherit the separation of spinless and spin-inclusive effects from the HPET fields, resulting in an explicit spin-multipole expansion of the three-point amplitude for any spin. By matching amplitudes expressed using the on-shell HPET variables to those derived from the one-particle effective action, we find that the spin-multipole expansion of a heavy spin- s particle corresponds exactly to the multipole expansion (up to order 2 s ) of a Kerr black hole, that is, without needing to take the infinite spin limit. Finally, we show that tree-level radiative processes with same-helicity bosons emitted from a heavy spin- s particle exhibit a spin-multipole universality.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP05(2020)051