Baryon distribution for high energy heavy ion collisions in a parton cascade model

TL;DR

This paper investigates baryon distribution in high-energy heavy ion collisions using a pQCD-based parton cascade model, revealing that baryon stopping at SPS and RHIC energies is primarily due to soft processes rather than hard scatterings.

Contribution

It introduces a new implementation of baryonic cluster formation and higher resonance states in a parton cascade model for the first time.

Findings

Baryon stopping is mainly caused by soft processes.

Model parameters fixed by elementary p-pbar data at 200 GeV.

Baryon and charged hadron distributions are successfully calculated.

Abstract

The baryon distribution is studied by using a parton cascade model which is based on pQCD incorporating hard partonic scattering and dynamical hadronization scheme. In order to study baryon distribution,baryonic cluster formation is newly implemented as well as hadronic higher resonance states from parton/beam cluster decay. The net baryon number and charged hadron distributions are calculated with different $K$-factors in which parameters are fixed by elementary $p\bar p$ data at $E_{c.m.}=200$ GeV. It is found that baryon stopping behavior at SPS and RHIC energies are not consequence of hard parton scattering but soft processes.