Weak Gravity Conjecture as a Razor Criterium for Exotic D-brane instantons

TL;DR

This paper explores how the Weak Gravity Conjecture constrains exotic D-brane instantons, impacting phenomenological models related to particle physics and cosmology.

Contribution

It demonstrates that the Weak Gravity Conjecture imposes indirect bounds on non-perturbative superpotentials from exotic instantons, affecting various phenomenological scenarios.

Findings

WGC leads to stringent bounds on exotic instanton effects

Implications for R-parity violation and neutrino masses

Constraints on collider physics and neutron-antineutron transitions

Abstract

We discuss implications of Weak gravity conjecture (WGC) for exotic D-brane instantons. In particular, WGC leads to indirect stringent bounds on non-perturbative superpotentials generated by exotic instantons, with many implications for phenomenology: R-parity violating processes, neutrino mass, $\mu$-problem, Neutron-Antineutron transitions and collider physics.