Nonchiral enhancement of scalar glueball decay in the Witten-Sakai-Sugimoto model

TL;DR

This paper investigates how finite pseudoscalar meson masses influence scalar glueball decay rates within the Witten-Sakai-Sugimoto holographic model, revealing a significant enhancement in decays to kaons and eta mesons that aligns with experimental observations.

Contribution

It introduces a method to incorporate finite pseudoscalar meson masses into glueball decay calculations in the holographic model, improving agreement with experimental data.

Findings

Decay rates into kaons and eta mesons are significantly enhanced.

Results closely match experimental data for the f0(1710) glueball candidate.

Finite meson masses have a substantial impact on decay predictions.

Abstract

We estimate the consequences of finite masses of pseudoscalar mesons on the decay rates of scalar glueballs in the Witten-Sakai-Sugimoto model, a top-down holographic model of low-energy QCD, by extrapolating from the calculable vertex of glueball fields and the eta' meson which follows from the Witten-Veneziano mechanism for giving mass to the latter. Evaluating the effect on the recently calculated decay rates of glueballs in the Witten-Sakai-Sugimoto model, we find a strong enhancement of the decay of scalar glueballs into kaons and eta mesons, in fairly close agreement with experimental data on the glueball candidate f0(1710).