Development and validation of HERWIG 7 tunes from CMS underlying-event measurements

Abstract

This paper presents a new set of parameters ("tunes") for the underlying-event model of the HERWIG 7 event generator. These parameters control the description of multiple-parton interactions (MPI) and colour reconnection in HERWIG 7, and are obtained from a fit to minimum-bias data collected by the CMS experiment at $\sqrt{s}=$ 0.9, 7, and 13 TeV. The tunes are based on the NNPDF 3.1 next-to-next-to-leading-order parton distribution function (PDF) set for the parton shower, and either a leading-order or next-to-next-to-leading-order PDF set for the simulation of MPI and the beam remnants. Predictions utilizing the tunes are produced for event shape observables in electron-positron collisions, and for minimum-bias, inclusive jet, top quark pair, and Z and W boson events in proton-proton collisions, and are compared with data. Each of the new tunes describes the data at a reasonable level, and the tunes using a leading-order PDF for the simulation of MPI provide the best description of the data.

arXiv commentReplaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/GEN-19-001 (CMS Public Pages)

References in corpus (43)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• FastJet user manual
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Herwig++ Physics and Manual
• HERWIG 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes)
• Parton distributions from high-precision collider data
• Dispelling the N^3 myth for the Kt jet-finder
• Parton distributions in the LHC era: MMHT 2014 PDFs
• Herwig 7.0 / Herwig++ 3.0 Release Note
• A Positive-Weight Next-to-Leading-Order Monte Carlo for Heavy Flavour Hadroproduction
• Merging meets matching in MC@NLO
• Rivet user manual
• Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at sqrt(s) = 7 TeV
• Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC
• Extraction and validation of a new set of CMS PYTHIA8 tunes from underlying-event measurements
• Systematic event generator tuning for the LHC
• Colour reconnections in Herwig++
• Dipole Showers and Automated NLO Matching in Herwig++
• Simulation of multiple partonic interactions in Herwig++
• Measurement of the Underlying Event Activity at the LHC with sqrt(s)= 7 TeV and Comparison with sqrt(s) = 0.9 TeV
• Rapidity gap cross sections measured with the ATLAS detector in pp collisions at sqrt(s) = 7 TeV
• Charged-particle distributions in $\sqrt{s}=13$ TeV $pp$ interactions measured with the ATLAS detector at the LHC
• Pseudorapidity distribution of charged hadrons in proton-proton collisions at sqrt(s) = 13 TeV
• Measurement of the jet fragmentation function and transverse profile in proton-proton collisions at a center-of-mass energy of 7 TeV with the ATLAS detector
• Measurement of differential cross sections for the production of top quark pairs and of additional jets in lepton+jets events from pp collisions at $\sqrt{s}=$ 13 TeV
• Shape, transverse size, and charged-hadron multiplicity of jets in pp collisions at sqrt(s) = 7 TeV
• Measurement of diffraction dissociation cross sections in pp collisions at sqrt(s) = 7 TeV
• Measurement of jet substructure observables in $\mathrm{t}\overline{\mathrm{t}}$ events from proton-proton collisions at $\sqrt{s}=$ 13TeV
• Improving the Simulation of Quark and Gluon Jets with Herwig 7
• Measurement of differential cross sections for Z boson production in association with jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Monte Carlo tuning in the presence of Matching
• Measurements of differential cross sections for associated production of a W boson and jets in proton-proton collisions at sqrt(s) = 8 TeV
• A Study of the Energy Dependence of the Underlying Event in Proton-Antiproton Collisions
• Soft and diffractive scattering with the cluster model in Herwig
• Measurements of differential cross sections of top quark pair production as a function of kinematic event variables in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Measurement of the differential cross sections for the associated production of a W boson and jets in proton-proton collisions at sqrt(s) = 13 TeV
• Measurement of the underlying event activity in inclusive Z boson production in proton-proton collisions at $\sqrt{s}=$ 13 TeV

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• A New Herwig7 Underlying Event Tune: from RHIC to LHC Energies
• Measurement of event shapes in minimum-bias events from proton-proton collisions at $\sqrt{s}$ = 13 TeV
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