JetViP 2.1: The hbook version. B. Potter.

PROGRAM SUMMARY
Title of program: JetViP version 2.1
Catalogue identifier: ADMV
Ref. in CPC: 133(2000)105
Distribution format: tar gzip file
High speed store required: 9MK words
Number of lines in distributed program, including test data, etc: 23309
Keywords: Elementary particle physics, Event simulation, Chromodynamics quantum, Jet physics, Deeply inelastic electron-proton (eP) and electron-photon (egamma) scattering(DIS), Photoproduction, Transition from photoproduction to DIS.
Programming language used: Fortran

Other versions of this program:

 Cat. Id.  Title                             Ref. in CPC
 ADKC      JetViP 1.1                         119(1999)45                    
 

Nature of physical problem:
In eP- and egamma-scattering experiments, the hadronic final state can be analyzed by jet cluster algorithms, yielding inclusive single- and dijet cross sections. These can be obtained in a continuous range of photon virtuality. The cross sections allow the extraction of parameters, such as alphas, Alpha(MSbar) or parton densities (also of the virtual photon), if the respective jet cross sections are theoretically known.

Method of solution:
JetViP is a computer program for the calculation of inclusive single- and dijet cross sections in eP- and egamma-scattering in NLO QCD. The virtuality of the photon, radiated by the incoming electron, can be chosen in a continuous range, reaching from photoproduction into deep inelastic scattering. The various contributions to the full jet cross section, including the resolved photon contributions, are implemented. The calculation is based on the phase-space-slicing method. The program uses VEGAS (multidimensional Monte Carlo integration routine), PDFLIB, SaSgam, GRS (parameterizations of parton densities).

Typical running time:
Varies strongly from LO to NLO and depends on type of subprocess (direct or resolved). At LO, running times of several minutes for a cross section are typical. At NLO, the running time for such a cross section is typically several hours.