Deconfinement transition in the revolving bag model

TL;DR

This paper investigates how rotation influences the deconfinement phase transition in the bag model, revealing that rotation can either raise or lower the transition temperature depending on the revolution effect, aligning with recent lattice simulation results.

Contribution

It introduces the revolving bag model, incorporating the revolution effect into the bag model to explain the impact of rotation on deconfinement transition temperature.

Findings

Revolution effect can increase the transition temperature with rotation.

Neglecting the revolution effect leads to a decrease in transition temperature.

The model aligns with recent lattice simulation results.

Abstract

Based on the bag model, we revisit the deconfinement phase transition under rotation. On top of the usual rotational energy for noninteracting particles, we perturbatively analyze the revolution effect of the hadron bag, i.e., of the potential confining quarks. The revolution effect can be phenomenologically translated into the rotational correction to the QCD vacuum energy or the gluon condensate. We demonstrate that if the revolution effect is (is not) taken into account, the transition temperature increases (decreases) as the angular velocity increased. The `revolving bag model' provides a feasible explanation of the recent lattice simulations, contrary to effective models, showing that rotation favors the confined phase.