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Seminar

On resonances, amplitudes and the UV completion of gravity (in English)

  • SPEAKER: Rodrigo Alonso De Pablo
    ( Kavli IPMU, University of Tokyo )
  • DATE: October 8th (Tue.) 11:00 - 12:00
  • PLACE: Kenkyu Honkan 1F, Meeting Room 1

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.