# A Strong WGC from the Modular Bootstrap

- Institution: CERN
- Department: Conferences & Workshops
- Speaker: Miguel Montero
- Year: 2019
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3015676)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

In its mildest version, the Weak Gravity Conjecture postulates the existence of superextremal particles of any charge Q. This is not really a constraint on the low-energy EFT, since this charge could a priori be arbitrarily large, resulting in a very massive WGC particle. This applies to (quasi-)sublattice versions of the conjecture too, where the role of Q is played by the index of the WGC sublattice. In this talk we will see how, in the context of worldsheet string theory, it is possible to obtain a universal upper bound on Q in the bosonic sector from the modular bootstrap, thus obtaining a strong form of the WGC in the closed string sector..

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## Lectures

1. [A Strong WGC from the Modular Bootstrap](https://invisiblenetwork.ai/learn/cern/3015676/5fcd6f038392), 26 min (CERN's player)