Color Screening Effects on Hadronization in Relativistic Heavy Ion Collisions

TL;DR

This paper investigates how color screening influences hadronization in relativistic heavy ion collisions, showing it delays hadron formation, reduces hadronic noise, and impacts parton equilibration, thus informing better modeling of quark-gluon plasma signals.

Contribution

It demonstrates the importance of including color screening effects in numerical models of hadronization at collider energies, highlighting their impact on phase transition dynamics.

Findings

Color screening delays hadronization.

Screening reduces hadron gas densities.

Hadronization disrupts parton equilibration.

Abstract

The effects of color screening on the hadronization of a parton plasma into a hadron gas are examined at the energies of the relativistic heavy ion collider. It is found to have the tendency to prevent hadronization and therefore delaying the conversion of the partons into a hadron gas. Because of the continual expansion, the resulting hadron gas number densities are lower when screening is included. This should reduce the hadronic noise to genuine signals of the quark-gluon plasma. In this sense, color screening is favorable and should be included in numerical models. In any case, we advocate that numerical models should allow the confining forces and color screening to act on each other so as to undergo the phase transition in a natural way. Hadronization is also shown to seriously disrupt parton equilibration and is yet another reason why full parton chemical equilibration should not be expected.