University of Cambridge > Talks.cam > DAMTP Friday GR Seminar > Causality constraints on corrections to the graviton 3-point coupling

Causality constraints on corrections to the graviton 3-point coupling

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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’s 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 ≤ 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.

This talk is part of the DAMTP Friday GR Seminar series.

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