Alpgen

• M. Mangano, M. Moretti, F. Piccinini, R. Pittau, A. Polosa

• Current developer: G. Grenier
• Former developers: C. Biscarat, G. Brooijmans

• Exact LO matrix elements for 2->n multiparton processes at hadron colliders
• Especially suited for boson(s)+jets (including heavy flavour) and ttbar productions
• Produces weighted and unweighted events
• Programming Language: Fortran 77 and 90
• Interfaced with Pythia or Herwig for events generation in D0
• Herwig interface also exists, both Pythia and Herwig interfaces are "Les Houches Accord" compliant
• Correct handling of parton flavour, color and polarization
• Current D0 version: 2.05 (Fall 2005)

• Wc (single c-quark) production. Fixed in p17.09.07.
  

• ALPGEN, a generator for hard multiparton processes in hadronic collisions, M.L. Mangano, M. Moretti, F. Piccinini, R. Pittau, A. Polosa, hep-ph/0206293
• Multijet matrix elements and shower evolution in hadronic collisions: W B Bbar + N jets as a case study, M.L. Mangano, M. Moretti, R. Pittau, Nucl.Phys.B632:343-362,2002; hep-ph/0108069
• A new approach to multijet calculations in hadron collisions, F. Caravaglios, M. L. Mangano, M. Moretti, R. Pittau, Nucl.Phys.B539:215-232,1999; hep-ph/9807570

D0 Documentation:

• Tips on Versions to Use 
• Tutorial
• D0 Note 5148 by Gerald Grenier
• Common Settings for Alpgen
• The latest script to extract the Alpgen+Pythia matched cross section from offically generated samples can be found in CVS under .../alpgen_prod/script/getXsection.py
  
  Usage:
  $ setup sam
  $ ./getXsection.py <(single ReqID) or (list of ReqIDs for a given process)>

Links:

• Main Page
• D0 Page

Last update:    08 February 08