Thraxions: Towards Full String Models

Understand

We elucidate various aspects of the physics of thraxions, ultra-light axions arising at Klebanov-Strassler multi-throats in the compactification space of IIB superstring theory.

• We study the combined stabilization of K\"ahler moduli and thraxions, showing that under reasonable assumptions, one can solve the combined problem both in a KKLT and a LVS setup.
• We find that for non-minimal multi-throats, the thraxion mass squared is three-times suppressed by the throat warp factor.
• However, the minimal case of a double-throat can preserve the six-times suppression as originally found.