String splitting and strong coupling meson decay

TL;DR

This paper investigates high spin meson decay using gauge/string duality, finding decay suppression in QCD-like regimes, and introduces a string splitting approach to calculate decay rates.

Contribution

It presents a novel method for calculating meson decay rates via string splitting in gauge/string duality frameworks, applicable to both N=4 SYM and large N QCD models.

Findings

Decay of high spin mesons is heavily suppressed in QCD regimes.

String splitting method effectively models meson decay processes.

Results align with expectations of decay suppression in supergravity regimes.

Abstract

We study the decay of high spin mesons using the gauge/string theory correspondence. The rate of the process is calculated by studying the splitting of a macroscopic string intersecting a D-brane. The result is applied to the decay of mesons in N=4 SYM with a small number of flavors and in a gravity dual of large N QCD. In QCD the decay of high spin mesons is found to be heavily suppressed in the regime of validity of the supergravity description.