Properties of new unflavored mesons below 2.4 GeV

TL;DR

This paper compares two theoretical models explaining the spectrum of highly excited light nonstrange mesons below 2.4 GeV, highlighting differences in their predictions for missing states and guiding future experimental searches.

Contribution

It systematically analyzes and compares chiral symmetry restoration and nonrelativistic models for meson spectra, proposing experimental tests to distinguish between them.

Findings

Both models successfully describe the global features of meson spectra.

Predictions for missing states differ significantly between the two models.

Future experiments are needed to validate the correct theoretical framework.

Abstract

The global features of spectrum of highly excited light nonstrange mesons can be well understood within both chiral symmetry restoration scenario combined with the relation $M^2\sim J+n$ and within nonrelativistic description based on the relation $M^2\sim L+n$. The predictions of these two alternative classifications for missing states are different and only future experiments can distinguish between the two. We elaborate and compare systematically the predictions of both schemes, which may serve as a suggestion for future experiments devoted to the search for missing states.