MS Seminar (Mathematics - String Theory)

Speaker: Rodrigo Alonso (IPMU)
Title: On resonances, amplitudes and the UV completion of gravity
Date: Fri, Oct 25, 2019, 13:15 - 14:30
Place: Balcony B
Related File: 2436.pdf
Abstract: We will construct, making use of the on-shell amplitude methods, a possible ultraviolet completion of gravity following a "bottom-up" approach. The assumptions of locality, unitarity and causality i) require an infinite tower of resonances with increasing spin and quantized mass, ii) introduce a duality relation among crossed scattering channels, and iii) dress all gravitational amplitudes in the Standard Model with a form factor that closely resembles either the Veneziano or the Virasoro-Shapiro amplitude in string theory. As a consequence of unitarity, the theory predicts leading order deviations from General Relativity in the coupling of gravity to fermions that can be explained if space-time has torsion in addition to curvature.