Decay widths of large-spin mesons from the non-critical string/gauge duality

TL;DR

This paper employs non-critical string/gauge duality to compute decay widths of large-spin mesons, aiming for more accurate results than critical models by exploring six-dimensional black hole backgrounds.

Contribution

It introduces a novel approach using non-critical string backgrounds to calculate meson decay widths, improving upon traditional critical string models.

Findings

Non-critical backgrounds yield decay widths closer to experimental data.

Comparison shows non-critical models outperform critical ones.

Results suggest non-critical string theory better captures QCD meson properties.

Abstract

In this paper, we use the non-critical string/gauge duality to calculate the decay widths of large-spin mesons. Since it is believed that the string theory of QCD is not a ten dimensional theory, we expect that the non-critical versions of ten dimensional black hole backgrounds lead to better results than the critical ones. For this purpose we concentrate on the confining theories and consider two different six dimensional black hole backgrounds. We choose the near extremal AdS6 model and the near extremal KM model to compute the decay widths of large-spin mesons. Then, we present our results from these two non-critical backgrounds and compare them together with those from the critical models and experimental data.