Asymptotic behavior of the Speed of Sound in Dense Matter
Udita Shukla, Pok Man Lo
TL;DR
This paper investigates the limitations of NJL-like models in predicting the speed of sound in dense matter and proposes a simple dynamical quark model to address these issues.
Contribution
It identifies the failure of NJL-like models to reach the conformal limit and introduces a new simple dynamical quark model that correctly reproduces this behavior.
Findings
NJL-like models do not reach the conformal limit of the speed of sound.
A simple dynamical quark model can successfully reproduce the conformal limit.
The proposed model improves the analysis of the equation of state in dense matter.
Abstract
We show that a class of NJL-like models fails to reproduce the expected conformal limit of the speed of sound, making them unsuitable for analyzing the equation of state of dense matter. We then demonstrate how this issue can be resolved within a simple dynamical quark model.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research · Pulsars and Gravitational Waves Research