Distinct Hagedorn temperatures from particle spectra: a higher one for mesons, a lower one for baryons

TL;DR

This paper demonstrates that mesons and baryons have distinct Hagedorn temperatures, with mesons exhibiting a higher temperature, explained by dual string models that account for their different excitation and combinatorial properties.

Contribution

It reveals the existence of different Hagedorn temperatures for mesons and baryons and explains this difference using dual string models.

Findings

Hagedorn temperature for mesons is higher than for baryons.

Dual string models explain the different spectra growth rates.

Predictions for other models' spectra features are discussed.

Abstract

We analyze experimental particle spectra and show that the Hagedorn temperature is significantly larger for mesons than for baryons. The effect can be explained within dual string models: excitations of three strings in the baryon produce ``faster'' combinatorics than a single string in the meson, hence lead to a more rapid growth of baryons than mesons. Predictions of other approaches for the gross features of particle spectra are also discussed.