PIRSA:19090020 Conference Cosmology Particle Physics Strong Gravity

DOI10.48660/19090020

Conference/School: Cosmological Frontiers in Fundamental Physics 2019

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

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

@misc{ pirsa_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},
  year = {2019},
  month = {sep},
  note = {PIRSA:19090020 see, \url{https://pirsa.org}}
}

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.

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