Programs in Physics & Physical Chemistry
|[Licence| Download | New Version Template] aepr_v2_0.tar.gz(16636 Kbytes)|
|Manuscript Title: HELAC-Onia 2.0: an upgraded matrix-element and event generator for heavy quarkonium physics|
|Authors: Hua-Sheng Shao|
|Program title: HELAC-Onia 2.0|
|Catalogue identifier: AEPR_v2_0|
Distribution format: tar.gz
|Journal reference: Comput. Phys. Commun. 198(2016)238|
|Programming language: Python, Fortran 77, Fortran 90, C++.|
|Operating system: Unix-like platform.|
|Keywords: Heavy quarkonium, NRQCD, Monte Carlo simulation.|
|Classification: 4.4, 11.1, 11.2, 11.5.|
External routines: LHAPDF
Does the new version supersede the previous version?: Yes
Nature of problem:
Heavy quarkonium production processes provide an important way to investigate QCD in its poorly known non-perturbative regime. Its production mechanism has been attracted extensive interests from the high-energy physics community in decades. The qualitative and quantitative description of heavy-quarkonium production requires complex perturbative computations for high-multiplicity processes in the framework of the well established non-relativistic effecitive theory, NRQCD, and reliable Monte Carlo simulations to repreduce the collider enviroment.
Based on a recursion relation, the program is able to calculate the helicity ampltiudes of the high-multiplicity heavy-qurkonium-production processes. Several modules are also designed for dedicated simulations:
Reasons for new version:
Improved and expanded functionalities.
Summary of revisions:
Many new features were added and several important bugs were fixed. The new features extend the range of the physical applications. With the new interface, it also helps to improve the user-friendliness of the program.
It depends on the process to be calculated and the required accuracy.
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