Holographic QCD predictions for production and decay of pseudoscalar glueballs

TL;DR

This paper uses a holographic QCD model to predict a heavier pseudoscalar glueball with specific decay patterns, suggesting experimental detection methods in high-energy colliders.

Contribution

It extends the holographic Witten-Sakai-Sugimoto model to predict properties of pseudoscalar glueballs, including mass and decay channels, which were not previously detailed.

Findings

Predicts a narrow pseudoscalar glueball heavier than the scalar one.

Identifies decay channels involving eta and eta' mesons.

Suggests detection via central exclusive production in colliders.

Abstract

The top-down holographic Witten-Sakai-Sugimoto model for low-energy QCD, augmented by finite quark masses, has recently been found to be able to reproduce the decay pattern of the scalar glueball candidate f0(1710) on a quantitative level. In this Letter we show that this model predicts a narrow pseudoscalar glueball heavier than the scalar glueball and with a very restricted decay pattern involving eta or eta' mesons. Production should be either in pairs or in association with eta(') mesons. We discuss the prospect of discovery in high-energy hadron collider experiments through central exclusive production by comparing with eta' pair production.