Programs in Physics & Physical Chemistry
|[Licence| Download | New Version Template] aaxg_v1_0.gz(61 Kbytes)|
|Manuscript Title: TWISTER: a Monte Carlo for QCD high-p(transverse) scattering.|
|Authors: G. Ingelman|
|Program title: TWISTER VERSION 1.2|
|Catalogue identifier: AAXG_v1_0|
Distribution format: gz
|Journal reference: Comput. Phys. Commun. 46(1987)217|
|Programming language: Fortran.|
|Computer: IBM 3084Q.|
|Operating system: MVS XA.|
|RAM: 728K words|
|Word size: 32|
|Keywords: Hard hadron-hadron Collisions, Qcd parton scattering, High p(transverse) Particles, Prompt photons, Higher twist, Prompt mesons, Monte carlo simulation, Hadronization, Event simulation, Particle physics, Elementary.|
|Classification: 11.2, 11.5.|
|AAFP_v1_0||JETSET 6.2||CPC 39(1986)347|
|AAFP_v2_0||JETSET 6.3||CPC 43(1987)367|
Nature of problem:
Production of high-p(transverse) particles in hadron-hadron scattering arise through the point-like interaction of constituent partons (quarks and gluons) as described by perturbative QCD. The formation of final state particles occur dominantly through a low momentum-transfer hadronization process, but also via the higher twist mechanism giving prompt mesons.
Perturbative QCD matrix elements are used for the underlying parton level interaction as well as the higher twist mechanism. For the soft hadronization process of the scattered partons and the hadron remnant spectators the Lund string model is employed. Included are all leading order 2 -> 2 QCD processes, single and double prompt photon production processes as well as higher twist processes giving prompt mesons and glueballs at high p(transverse). Complete events are simulated making direct comparsion with any experimental observable possible.
Properties of high p(transverse) jets produced at collider energies are not well described since multiple gluon radiation effects are not included.
A random number generator and the ordinary gamma function are required.
The time needed to generate one event is 0.02 to 0.08 seconds depending on energy and p(transverse) scale.
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