HIJING is a Monte Carlo event generator for parton and particle production in high energy hadronic and nuclear collisions. Based on QCD-inspired models for multiple jet production, it is designed in particular to study jet and mini-jet production and associated particle production in high energy pp, pA and AA collisions. This model incorporates mechanisms such as multiple minijet production, soft excitation, nuclear shadowing of parton distribution functions and jet interactions in dense hadronic matter.

HIJING is written in FORTRAN 77, consisting of subroutines for physics simulation and common blocks for parameters and event records, similar in form to PYTHIA 5.3 to generate kinematic variables for each hard scattering and JETSET 7.2 for jet fragmentation. The soft hadronic physics is modeled using a modified version of FRITIOF (but with ATTILA nuclear geometry). No secondary interactions (e.g. rescattering of produced particles) is yet implemented, except for the energy loss of jets.

Technical Descriptions

Start with the long write-up, which was published in ?, also available in LaTeX and Postscript (230 Kbytes) form. This write-up contains

You will not need all this information in order to run the STAR HIJING, but those who will be working intensively with HIJING are suggested to read this in detail.

Some of the technical information contained in the long write-up has or will become out of date; therefore, after reading this, it is suggested that the user refer to hijing.doc for a shorter but more accurate technical description.

Offical distribution copy of HIJING

Xin-Nian Wang maintains the official distribution copy of HIJING, which is available via anonymous ftp from nsdssd.lbl.gov under pub/xnwang. I hope that XN will put in a README file to describe the contents of this directory.

Example data

Some sample distributions are available in Postscript from XN's distribution ftp directory:


HIJING is, according to Matt Bloomer, the most thoroughly documented and tested heavy ion event generator on the market. It has been compared extensively to pp and p-pbar data at collider energy, and with existing heavy ion data at SPS energies. The following list contains references to articles which deal directly with HIJING or with the physics it contains. References nos. 2 and 3 are strongly recommended.

1. Role of multiple minijets in high-energy hadronic reactions, Xin-Nian Wang: Phys. Rev. D43 (1991) 104.

2. HIJING: A Monte Carlo model for multiple jet production pp, pA, and AA collisions, Xin-Nian Wang and Miklos Gyulassy: Phys. Rev. D44 (1991) 3501.
Extensive overview of physics implemented withing HIJING.

3. Systematic study of particle production in p+p(pbar) collisions via the HIJINGX model, Xin-Nian Wang and Miklos Gyulassy: Phys. Rev. D45 (1992) 844.
Detailed comparison of HIJING to collider data.

4. Gluon Shadowing and jet quenching in A+A collisins at sqrt(s)=200 AGeV, Xin-Nian Wang and Miklos Gyulassy: Phys. Rev. Lett. 68 (1992) 1480.

A complete list of articles by Xin-Nian Wang can be obtained by querying the WWW SLAC SPIRES HEP database.

Last modified: 5 April 1996

Andrea Schiemann

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