Navigate these pages by using the menu to the left. More plots will be added, as new tunes become available, and as the available data increases. The default for each topic is a comparison of a small number of tunes to available data (or just to each other if no data exists), but look for links at the top of each page for comparisons with more models.

May 2010: The Perugia Tunes - Full descriptions and parameters of the "Perugia" tunes, including Perugia 2010 and Perugia K (journal writeup)
Apr 2009: The Perugia Tunes (in Perugia 2008 MPI workshop proceedings)
Dec 2007: Some interesting min-bias distributions for early LHC runs (submitted to the 2007 Les Houches workshop proceedings)

The tunes currently available on the plots are (numbered as in PYTUNE):

Tunes using Q2-ordered model

• 100: A: Rick Field's Tune A to Tevatron Underlying-Event Data. Uses the "old" UE and shower models, with a double-gaussian matter profile, 1 GeV of primordial kT, and near-maximal color correlations. [Oct 2002]
• 103: DW: Rick Field's Tune DW to Tevatron Underlying-Event and Drell-Yan Data. Similar to Tune A, but has 2 GeV of primordial kT and uses a very small renormalization scale for initial-state radiation (i.e., more ISR radiation). It also has completely maximal color correlations. [Apr 2006]
• 104: DWT: Variant of DW using the Pythia 6.2 default collider energy scaling (has worse agreement with Tevatron energy scaling quantities than DW). [Apr 2006]
• 106: ATLAS-DC2 ("Rome"): first ATLAS tune of the Q2-ordered showers and old UE framework. Does not give very good agreement with Tevatron min-bias quantities.
• 107: A-CR: variant of Tune A using the Pythia 6.2 default color connections but with the new "color annealing" color reconnection model applied as an afterburner. Is intended as an example of strong color reconnections. [Mar 2007]
• 108: D6: Rick Field's Tune D6 to Tevatron data, using CTEQ6L1 PDFs.
• 110: A-Pro: Tune A with LEP tune from Professor. [Oct 2008]
• 113: DW-Pro: Tune DW with LEP tune from Professor. [Oct 2008]
• 114: DWT-Pro: Tune DWT with LEP tune from Professor. [Oct 2008]
• 116: ATLAS-DC2-Pro: ATLAS-DC2 with LEP tune from Professor. [Oct 2008]
• 117: A-CR-Pro: Tune A-CR with LEP tune from Professor. [Oct 2008]
• 118: D6-Pro: Tune D6 with LEP tune from Professor. [Oct 2008]
• 129: Pro-Q20: Tune of the Q2-ordered showers and old UE framework made with Professor, an automated tuning tool. [Feb 2009]

Tunes intermediate between Q2- and pT-ordered models

• 201: A-PT: Retune of Tune A with pT-ordered final-state showers. [Mar 2007]
• 211: A-PT-Pro: Tune A-PT with LEP tune from Professor. [Oct 2008]
• 221: Perugia A-PT: "Perugia" update of A-PT-Pro. [Feb 2009]
• 226: Perugia A6-PT: "Perugia" update of A-PT-Pro, using CTEQ6L1 PDFs. [Feb 2009]

Tunes using pT-ordered model

• 300: S0: First Sandhoff-Skands Tune of the "new" UE and shower framework, with a smoother matter profile than Tune A, 2 GeV of primordial kT, and "colour annealing" color reconnections. Uses the default Pythia energy scaling rather than that of Tune A. [Apr 2006]
• 303: S0A: A variant of S0 which is identical to S0 at the Tevatron, but which uses the Tune A energy scaling of the UE activity. [Apr 2006]
• 304: NOCR: Sandhoff-Skands "best try" without color reconnections. Gives less good agreement with Tevatron data. [Apr 2006]
• 306: ATLAS-CSC: first ATLAS tune of the pT-ordered showers and new UE framework. Does not give very good agreement with Tevatron min-bias quantities.
• 313: S0A-Pro: A variant of S0A revamped with a comprehensive retune of the fragmentation parameters to LEP data (by the "Professor" tool, hence the name). [Oct 2008]
• 314: NOCR-Pro: NOCR with LEP tune from Professor. [Oct 2008]
• 320: Perugia 0: "Perugia" update of S0-Pro. [Feb 2009]
• 321: Perugia HARD: Systematically "hard" variant of Perugia 0. [Feb 2009]
• 322: Perugia SOFT: Systematically "soft" variant of Perugia 0. [Feb 2009]
• 323: Perugia 3: Variant of Perugia 0 with different ISR/MPI balance and different collider energy scaling. [Feb 2009]
• 324: Perugia NOCR: "Perugia" update of NOCR-Pro. [Feb 2009]
• 325: Perugia X: Variant of Perugia 0 using MRST LO* PDFs. [Feb 2009]
• 326: Perugia 6: Variant of Perugia 0 using CTEQ6L1 PDFs. [Feb 2009]
• 327: Perugia 2010: Variant of Perugia 0 with updated fragmentation parameters and more FSR off ISR. [Apr 2010]
• 328: Perugia K: Variant of Perugia 2010 using a K-factor of 1.5 on the QCD scattering cross sections in the UE. [Apr 2010]
• 329: Pro-pT0: Tune of the pT-ordered showers and new UE framework made with Professor, an automated tuning tool. [Feb 2009]