"Causality constraints on corrections to the graviton 3-point coupling"
Dr. Jose Edelstein,
Universidad de Santiago de Compostela
I will consider higher derivative corrections to the graviton 3-point
coupling within a weakly coupled theory of gravity. Lorentz invariance
allows further structures beyond that of Einstein\u2019s theory. I will argue
that these structures are constrained by causality, and show that the
problem cannot be fixed by adding conventional particles with spins J \u2264 2,
but adding an infinite tower of massive particles with higher spins.
Implications of this result in the context of AdS/CFT, quantum gravity in
asymptotically flat space-times, and non-Gaussianity features of primordial
gravitational waves are discussed.