The WHIZARD Event Generator

The Generator of Monte Carlo Event Generators for LHC, ILC and other High Energy Physics Experiments

Version 2.0 of WHIZARD has its release candidate 3 come out on Mar 3rd, 2010. The distribution tarball of the sources can be found here. Note that as yet not all features and optimizations of WHIZARD 1 have been reenabled. CAVEAT EMPTOR: A lot has changed and the documentation is as yet far from complete. … You can also access our subversion repository at http://svn.hepforge.org/whizard/trunk for checking out (pun intended!) the current sources. Note, that the svn contains the latest developer version. In order to be able to compile the svn version, one has to first generate the configure script out of the file configure.ac by running autoreconf (NOT autoconf) which is part of the autoconf/automake http://www.gnu.org/software/autoconf and http://www.gnu.org/software/automake package. Furthermore, the development version also needs the noweb tools to be installed on the system in order to extract the source codes and documentation from several so called .nw files. The noweb package can be downloaded and installed from here: http://www.cs.tufts.edu/~nr/noweb . Version 1: The sources for version 1.95 can be found here. Note that with version 1.94 the development of new features in version 1 stops; there will be only bug fixes from now on. Look at this link for installation instructions. You may want to inspect the latest news and the list of changes. Before installing WHIZARD, you should also check the note on compilers. The manual is available in HTML and in PostScript and PDF formats. Note that the manual needs (and will get) a major update. Service for archaeologists and regression testers: old sources are kept here and here.

WHIZARD has been written by Wolfgang Kilian, Thorsten Ohl. and Jürgen Reuter.

Contact:

The current versions are 1.95 (Feb 25th, 2010) and 2.0.0_rc3 (Mar 3rd, 2010).

The WHIZARD project is a part of the Strategic Helmholtz Alliance Physics at the Terascale.

WHIZARD is a program system designed for the efficient calculation of multi-particle scattering cross sections and simulated event samples.

Tree-level matrix elements are generated automatically for arbitrary partonic processes by using the Optimized Matrix Element Generator O'Mega. Matrix elements obtained by alternative methods (e.g., including loop corrections) may be interfaced as well. The program is able to calculate numerically stable signal and background cross sections and generate unweighted event samples with reasonable efficiency for processes with up to six final-state particles; more particles are possible.

Polarization is treated exactly for both the initial and final states. Final-state quark or lepton flavors can be summed over automatically where needed. For Linear Collider physics, beamstrahlung (CIRCE) and ISR spectra are included for electrons and photons. For hadron collider physics, an interface to the standard PDFLIB is provided. The events can be fragmented internally using the built-in PYTHIA interface or written to file in standard formats, including ASCII, STDHEP, or the Les Houches event format.

Currently, WHIZARD supports the Standard Model (optionally, with anomalous couplings), the MSSM, Little Higgs models, Zprime models, and supports gravitinos and gravitons. Model extensions or completely different models can be added.

If you use WHIZARD, please cite the following references:

• W. Kilian, T. Ohl, J. Reuter, WHIZARD: Simulating Multi-Particle Processes at LHC and ILC , arXiv: 0708.4233 [hep-ph]
• M. Moretti, T. Ohl, J. Reuter, O'Mega: An Optimizing matrix element generator , LC-TOOL-2001-040-rev, arXiv: hep-ph/0102195-rev.
• W. Kilian, WHIZARD Manual 1.0, LC-TOOL-2001-039, http://www-flc.desy.de/lcnotes/. This document is identical to the manual of version 1.0.

Examples of WHIZARD usage:

• A standard reference of SUSY cross sections can be found here.

WHIZARDs matrix element generator is O'Mega:

The tarball for the O'Mega matrix element generator as a stand-alone tool you can find here.

Back to www.event-generator.org.

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