On the weak gravity conjecture in string theory with broken supersymmetry
Abstract
We use type I string models with supersymmetry broken by compactification (à la ScherkSchwarz) in order to test the weak gravity conjecture in the presence of runaway potentials in a perturbative string theory setting. For a finite value of the supersymmetry breaking radius there is a runaway potential, which is the only possibility if one accepts the nonexistence of de Sitter vacua. Although the weak gravity conjecture is valid in the decompactification limit, for fixed values of the radius we show that there are shortranged attractive D1 branebrane interactions. We argue however that at oneloop level the effective tension of the branes decreases and becomes smaller than the effective charge such that there is a longranged repulsive force and the weak gravity conjecture is respected. Moreover, for very small g_{s} we expect a large number of stable bound states to be present.
 Publication:

Nuclear Physics B
 Pub Date:
 October 2019
 DOI:
 10.1016/j.nuclphysb.2019.114738
 arXiv:
 arXiv:1811.11199
 Bibcode:
 2019NuPhB.94714738B
 Keywords:

 High Energy Physics  Theory
 EPrint:
 v4: corrected funding information