Particles and Fields Seminar
How Unique is Classical Gravity?
Shiraz Minwalla
Tata Institute
Abstract
We conjecture that low energy constraints are sufficient to classify all consistent tree level gravitational S matrices - i.e. S matrices whose
kinematical singularities consist only of poles. Specializing to local theories (theories with a finite number of derivatives and no more than a finite number of exchange poles) we present an argument for this conjecture. The argument proceeds assuming the so called CRG conjecture, i.e. that classical gravitational S matrices cannot scale faster with energy than $s^2$ in the Regge limit. We also review arguments in support of this conjecture.
(Seminar will be via Zoom and streamed in the seminar room)
kinematical singularities consist only of poles. Specializing to local theories (theories with a finite number of derivatives and no more than a finite number of exchange poles) we present an argument for this conjecture. The argument proceeds assuming the so called CRG conjecture, i.e. that classical gravitational S matrices cannot scale faster with energy than $s^2$ in the Regge limit. We also review arguments in support of this conjecture.
(Seminar will be via Zoom and streamed in the seminar room)