Tuning Monte Carlo Generators: The Perugia Tunes

By Peter Z. Skands. 2010

1,491 citations recorded by the source corpus.

We present 9 new tunes of the p{sub perpendicular}-ordered shower and underlying-event model in Pythia 6.4. These 'Perugia' tunes update and supersede the older 'S0' family. The data sets used to constrain the models include hadronic Z{sup 0} decays at LEP, Tevatron min-bias data at 630, 1800, and 1960 GeV, Tevatron Drell-Yan data at 1800 and 1960 GeV, and SPS min-bias data at 200, 546, and 900 GeV. In addition to the central parameter set, called 'Perugia 0', we introduce a set of 8 related 'Perugia variations' that attempt to systematically explore soft, hard, parton density, and color structure variations in the theoretical parameters. Based on these variations, a best-guess prediction of the charged track multiplicity in inelastic, nondiffractive minimum-bias events at the LHC is made. Note that these tunes can only be used with Pythia 6, not with Pythia 8.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/b952939f1db95879cb2f53a24742012f49f4aa84

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Citations in the corpus

Jet energy measurement and its systematic uncertainty in proton–proton collisions at $$\sqrt{s}=7$$s=7 TeV with the ATLAS detector (2015, methodology): “For the underlying event and radiation modelling systematics, the Pythia Perugia 2011 [88] samples are used.”
A new method to distinguish hadronically decaying boosted Z bosons from W bosons using the ATLAS detector (2015, neutral): “426 is used everywhere for PYTHIA 6, with the Perugia2011C tune [27].”
Multiplicity dependence of the average transverse momentum in pp, p-Pb, and Pb-Pb collisions at the LHC (2013, methodology): “The observed strong correlation of p T with N ch has been attributed, within PYTHIA models, to color reconnections (CR) between hadronizing strings [34].”
Jet energy measurement with the ATLAS detector in proton-proton collisions at $\sqrt{\mathrm{s}}=7\ \mathrm{TeV}$ (2013, methodology): “The PERUGIA2010 tune is an independent tune of PYTHIA with increased final state radiation to better reproduce the jet shapes and hadronic event shapes using LEP and TEVATRON data [51].”
Search for dark matter candidates and large extra dimensions in events with a jet and missing transverse momentum with the ATLAS detector (2012, result): “Moreover, the αs scale is varied in PYTHIA within a range that is consistent with experimental data [69].”
Search for the standard model Higgs boson produced in association with top quarks and decaying into a bb¯ pair in pp collisions at √s=13 TeV with the ATLAS detector (2018, background): “428 [73] with the Perugia 2012 set of tuned parameters [74].”
Boosted objects: a probe of beyond the standard model physics (2010, methodology): “The series started with the BOOST09 [3] workshop at Stanford National Accelerator Centre (SLAC) and continued at the Jet Substructure workshop at the University of Washington [ 4 ] in January 2010.”
Handbook of LHC Higgs Cross Sections: 3. Higgs Properties (2013, methodology): “As a cross check, the MPI-induced variations in the sele ct d cross sections have been studied (based on stable particles) also in the Pythia 6 DW [272], Pythia 6 Pe rugia 2011 [273] and Pythia 8 4C [274] tunes.”
Jet energy measurement with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV (2011, methodology): “The PERUGIA2010 tune is an independent tune of PYTHIA with increased final state radiation to better reproduce the jet shapes and hadronic event shapes using LEP and TEVATRON data [51].”
String formation beyond leading colour (2015, methodology): “We stress that this is merely a starting point, hopefully to be revised soon by comparisons with new data from the LHC experiments.”
Search for additional heavy neutral Higgs and gauge bosons in the ditau final state produced in 36 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector (2017, methodology): “428 with the CTEQ6L1 PDF sets and the corresponding Perugia 2012 tune [107].”
Tuning PYTHIA 8.1: the Monash 2013 tune (2014, methodology): “We follow the approach of the Perugia tunes of PYTHIA 6 [6,8] and use the same αs(Mz) value for initial-state radiation as that obtained for final-state radiation.”
Event generator tunes obtained from underlying event and multiparton scattering measurements (2015, methodology): “Table 4: The PYTHIA6 parameters, tuning range, Tune Z2∗lep values [31], and best-fit values for CUETP6S1-CTEQ6L1 and CUETP6S1-HERAPDF1.”
Prompt charm production in pp collisions at sqrt(s)=7 TeV (2013, neutral): “4: LHCb-tune [17], Perugia 0, Perugia NOCR, and Perugia 2010 [30].”