PIRSA:19090020

Video URL

https://pirsa.org/19090020

Weak Gravity Conjecture From Amplitudes’ Positivity

Bellazzini, B. (2019). Weak Gravity Conjecture From Amplitudes’ Positivity. Perimeter Institute for Theoretical Physics. https://pirsa.org/19090020

Bellazzini, Brando. Weak Gravity Conjecture From Amplitudes’ Positivity. Perimeter Institute for Theoretical Physics, Sep. 03, 2019, https://pirsa.org/19090020 

          @misc{ scivideos_PIRSA:19090020,
            doi = {10.48660/19090020},
            url = {https://pirsa.org/19090020},
            author = {Bellazzini, Brando},
            keywords = {Cosmology, Particle Physics, Strong Gravity},
            language = {en},
            title = {Weak Gravity Conjecture From Amplitudes{\textquoteright} Positivity},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2019},
            month = {sep},
            note = {PIRSA:19090020 see, \url{https://scivideos.org/index.php/pirsa/19090020}}
          }

Brando Bellazzini CEA Saclay

Talk numberPIRSA:19090020
DOI10.48660/19090020
Source RepositoryPIRSA
Collection
Talk Type Conference
Subject

Abstract

I will show how to derive new positivity bounds for scattering amplitudes in theories with a massless graviton in the spectrum in four spacetime dimensions. The bounds imply that extremal black holes are self-repulsive, M/|Q|<1 once higher dimensional operators are taken into account, and that they are unstable to decay to smaller extremal black holes, hence providing an S-matrix proof of the weak gravity conjecture.