Phenomenology of Strong Interactions -- Towards an Effective Theory for Low Energy QCD

TL;DR

This paper develops string-inspired models to explore low-energy QCD phenomena, including confinement, phase transitions, and vacuum properties, providing a phenomenological framework for understanding strong interactions.

Contribution

It introduces a novel string-based effective theory for low-energy QCD phenomena, extending the Dirac-Born-Infeld action to model confinement and related properties.

Findings

Model describes color confinement among glueballs

Analyzes QCD vacuum and phase transitions

Investigates glueball-meson mixing and scalar glueball mass

Abstract

In this paper, we develop models applicable to phenomenological particle physics by using the string analogy of particles. These theories can be used to investigate the phenomenology of confinement, deconfinement, chiral condensate, QGP phase transitions, and even the evolution of the early universe. Other confining properties such as scalar glueball mass, gluon mass, glueball-meson mixing states, QCD vacuum, and color superconductivity can also be investigated in these model frameworks. We use one of the models to describe the phenomenon of color confinement among glueballs at the end of the paper. The models are built based on the Dirac-Born-Infeld (DBI) action modified for opened strings with their endpoints on a D$p$-brane or brane-anti-brane at a tachyonic vacuum.