# Excited mesons, baryons, glueballs and tetraquarks: Predictions of the Holography Inspired Stringy Hadron model

## TL;DR

This paper summarizes the Holography Inspired Stringy Hadron (HISH) model's predictions for the masses and widths of various excited hadron states, including mesons, baryons, glueballs, and tetraquarks, based on string theory concepts.

## Contribution

It provides a comprehensive set of predictions for excited hadron states using the HISH model, including a method to distinguish glueballs from flavorless mesons.

## Key findings

- Predicted masses and widths for various hadron states.
- Method to identify glueballs among flavorless mesons.
- Characterization of tetraquarks as baryon-antibaryon states.

## Abstract

In this note we collect and summarize the predictions of the Holography Inspired Stringy Hadron (HISH) model. We list the masses and widths of predicted excited states across the spectrum, based on placing the different hadrons on the non-linear Regge trajectories of a string with massive endpoints. Our predicted states include: (i) Light, heavy-light and heavy-heavy mesons. (ii) Baryons, including charmed, doubly charmed and bottom baryons. (iii) Glueballs, together with a method to disentangle them from flavorless mesons. (iv) Genuine tetraquarks, which are not "molecules" of hadrons, and are characterized by their decay into a baryon and an anti-baryon.