HIJING 1.0: A Monte Carlo Program for Parton and Particle Production in High Energy Hadronic and Nuclear Collisions

TL;DR

HIJING 1.0 presents a Monte Carlo framework for simulating parton and particle production in high-energy hadronic and nuclear collisions by marrying a pQCD-inspired multi-jet production mechanism with a Lund string-based soft interaction model. It incorporates nuclear effects such as parton shadowing and jet quenching due to final-state interactions, implemented within a Glauber geometry for pA and AA collisions and interfaced with PYTHIA and JETSET for hard processes and fragmentation. The package provides detailed event-record structures and a rich parameter set to study jet structure, minijet production, and potential QGP signatures under RHIC/LHC-era conditions. As a practical tool, HIJING enables controlled studies of initial-state and medium-induced effects on jet production, serving as a theoretical laboratory for initial conditions and background estimates in heavy-ion physics.

Abstract

Based on QCD-inspired models for multiple jets production, we developed a Monte Carlo program to study jet and the associated particle production in high energy $pp$, $pA$ and $AA$ collisions. The physics behind the program which includes multiple minijet production, soft excitation, nuclear shadowing of parton distribution functions and jet interaction in dense matter is briefly discussed. A detailed description of the program and instructions on how to use it are given.