PROGRAM SUMMARY
Title of program:
RACOONWW, version 1.3
Catalogue identifier:
ADRU
Ref. in CPC:
153(2003)460
Distribution format: tar gzip file
Operating system: UNIX, Linux
High speed store required:
4MK words
Number of lines in distributed program, including test data, etc:
44597
Keywords:
Radiative corrections, W-pair production, Four-fermion production,
Triple guage-boson couplings, Quartic gauge-boson couplings,
Monte Carlo integration, Event generation, Elementary
particle physics, QCD.
Programming language used: Fortran
Computer:
DEC/ALPHA ,
Linux PCs .
Nature of physical problem:
Precision calculations for W-pair production, four-fermion production,
and four-fermion plus photon production in e+e- annihilation.
Method of solution:
Multi-channel Monte Carlo integration of perturbatively calculated
multidifferential cross sections including radiative corrections to e+e-
->4f. The code can generate weighted and unweighted events. For
hadronization an interface to PYTHIA is provided.
Restrictions:
Virtual O(alpha) radiative corrections are included in double-pole
approximation (DPA) only. Higher-order initial-state radiation is
included via collinear structure functions in leading-logarithmic
approximation. QCD corrections are included as a global multiplicative
factor (1 + alphas/pi) for each hadronically decaying W boson. The
external fermions are assumed to be massless. Below about 170 GeV the
DPA is not applicable, and above 500 GeV contributions become
numerically important that are not yet implemented in RACOONWW.
Typical running time:
On a DEC/ALPHA workstation the computing time for calculating 10**7
weighted events for tree-level predictions is about 2 hours. When
including radiative corrections the computing time for 5 x 10**7
weighted events amounts to about 30 hours.