Speaker
Barak Kol
(Jerusalem)
Description
I shall discuss an improvement to the (Classical) Effective
Field Theory approach to the non-relativistic or Post-Newtonian
approximation of General Relativity. The "potential metric field" is
decomposed through a temporal Kaluza-Klein ansatz into three
NRG-fields: a scalar identified with the Newtonian potential, a
3-vector corresponding to the gravito-magnetic vector potential and a
3-tensor. The derivation of the Einstein-Infeld-Hoffmann Lagrangian
simplifies such that each term corresponds to a single Feynman diagram
providing a clear physical interpretation. Spin interactions are
associated with the gravito-magnetic field. Leading correction
diagrams corresponding to the 3PN correction to the spin-spin
interaction and the 2.5PN correction to the spin-orbit interaction
will be presented.
