Pythia

• Main: T. Sjöstrand
• SUSY RPC and TC: S. Mrenna
• SUSY RPV: P. Skands
 

 
 

• S. Muanza
• G. Brooijmans
 

• Physics Models: SM including higgs production, 2HDM, SUSY RPC, SUSY RPV (partially), ED, TC, Compositeness, W', Z', 4th generation fermions,...
• Uses Leading Order (LO) matrix elements (mainly for 2->2 and 2->1->2 processes)
• Programming Language: Fortran 77
• Generates extra jets through ISR and FSR of gluons plus a Parton Shower algorithm (leading log. MC)
• Fragmentation: uses the LUND string fragmentation model (model in good agreement with LEP and TEVATRON data)
• Correct handling of the color flow
• Current D0 version: 6.323 (20 Jul 2005)

• PYTHIA 6.206, T. Sjöstrand, L. Lönnblad, S. Mrenna and P. Skands [hep-ph/0108264]
• PYTHIA 6.154, T. Sjöstrand, P. Edén, C. Friberg, L. Lönnblad, G. Miu, S. Mrenna and E. Norrbin, Computer Phys. Commun. 135 (2001) 238 [hep-ph/0010017]

Decay Table: it was changed between v6.3 and v6.4 (details here)

Generator cut bug: when y* cuts are used if for example CKIN(9)=-4.2 and CKIN(10)=4.2 then the cross section is wrong a the events not symetrically distributed wrt to theta* one needs to add CKIN(11)=CKIN(9) and CKIN(12)=CKIN(10)

• Main Page
• D0 Page (mcpp_gen)
• Online Documentation
• MCP11-13 Pythia Cross Sections (Pythia 6.2 + CTEQ4L)
• Pythia 6.2: C-Hadrons and B-Hadrons Decays
• "How To": Shell Script to Run MCpythia.x (without mc_runjob)

Last update:  SM  08 Feb 08