Hadronization via Recombination

TL;DR

This paper presents a dynamic simulation model for hadronization via recombination in heavy-ion collisions, demonstrating its ability to explain key experimental features observed at RHIC.

Contribution

It introduces a hydrodynamic evolution combined with valence quark recombination and rescattering, providing a comprehensive simulation framework for heavy-ion collision outcomes.

Findings

Recombination explains constituent quark number scaling of elliptic flow.

The model reproduces the baryon-to-meson ratio near 5 GeV/c.

Preliminary results show promising agreement with experimental data.

Abstract

The recombination model as a model for hadronization from a quark-gluon plasma has been recently revived since it has advantages in explaining several important features of the final state produced in heavy-ion collisions at RHIC, such as the constituent quark number scaling of the elliptic coefficient versus the transverse energy of identified hadrons, the bending shape of the $p_T$ spectrum of hadrons near 5 GeV/c, and the measured large value of baryon to meson ratio(of the order of unity) in the same $p_T$ range. We have developed a dynamic simulation model of heavy-ion collisions in which a quark-gluon plasma, starting from a certain initial condition, evolves hydrodynamically until it reaches the phase boundary, and then hadronizes by valence quark recombination. Rescattering after hadronization is described by UrQMD. We discuss some details of the model and report first, preliminary results.