JIMMY Generator
Multiparton Interactions in HERWIG

JIMMY Generator is a library of routines for linking with the now obsolete fortran HERWIG Monte Carlo event generator. JIMMY allowed you to generate multiple parton scattering events in hadron-hadron, photon-photon or photon-hadron events. The physics content of JIMMY was implemented and improved in the later versions of Herwig. Like fortran HERWIG, JIMMY is no longer supported.

Downloads (legacy interest only)

• Standard tarball configured with autotools from the downloads page. Then follow these steps.
• Download the Source code, Include file, Example main program for Jimmy 4.1. If you do this, beware the fortran flag issue below. If you really need jimmy distributed in the single fortran file, please let me know. Otherwise 4.1 will most likely be the last version distributed this way.

Documentation

• The original paper describing JIMMY focusses on photoproduction, but describes the main features and parameters of the basic model.
• A draft write-up of version 4 is available. Last udated 16/11/2005.

Some results on the generator were presented at various workshops and/or published. A selection is given below:

• JetWeb generator tuning and validation.
• There have been several talks on JIMMY at the HERA/LHC workshop.
• J. M. Butterworth, J. R. Forshaw and M. H. Seymour
  Multiparton Interactions in Photoproduction at HERA
  CERN-TH/95-82, MC-TH-96/05, UCL-HEP 96-02 hep-ph/9601371. Zeit. für Phys. C72 (1996) 637-646.
• L. Lonnblad, M. Seymour et al
  gamma-gamma Event Generators
  hep-ph/9512371. In the report of the CERN Workshop on LEP2 Physics
• J. M. Butterworth and J. R. Forshaw
  Photoproduction of Multi-Jet Events at HERA - A Monte Carlo Simulation
  J.Phys.G19:1657-1663,1993

Credits and Blame

The generator was developed by Jon Butterworth, Jeff Forshaw, Mike Seymour and Rod Walker. The code has not been maintained or supported for several years now (see top).