Measurements of angular distance and momentum ratio distributions in three-jet and Z + two-jet final states in pp collisions
arXiv:2102.08816 · doi:10.1140/epjc/s10052-021-09570-2
Abstract
Collinear (small-angle) and large-angle, as well as soft and hard radiations are investigated in three-jet and Z + two-jet events collected in proton-proton collisions at the LHC. The normalized production cross sections are measured as a function of the ratio of transverse momenta of two jets and their angular separation. The measurements in the three-jet and Z + two-jet events are based on data collected at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.8 fb. The Z + two-jet events are reconstructed in the dimuon decay channel of the Z boson. The three-jet measurement is extended to include 13 TeV data corresponding to an integrated luminosity of 2.3 fb. The results are compared to predictions from event generators that include parton showers, multiple parton interactions, and hadronization. The collinear and soft regions are in general well described by parton showers, whereas the regions of large angular separation are often best described by calculations using higher-order matrix elements.
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/SMP-17-008 (CMS Public Pages)
References in corpus (41)
- 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
- A Brief Introduction to PYTHIA 8.1
- FastJet user manual
- New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
- 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
- Parton distributions for the LHC Run II
- New parton distributions for collider physics
- Event generation with SHERPA 1.1
- Parton distributions with LHC data
- PDF4LHC recommendations for LHC Run II
- A parton shower algorithm based on Catani-Seymour dipole factorisation
- QCD Matrix Elements + Parton Showers
- Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
- Particle-flow reconstruction and global event description with the CMS detector
- The CMS trigger system
- Event generator tunes obtained from underlying event and multiparton scattering measurements
- Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV
- Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
- Parton distributions with QED corrections
- SVD Approach to Data Unfolding
- Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at 13 TeV
- General-purpose event generators for LHC physics
- Interleaved Parton Showers and Tuning Prospects
- Performance of missing transverse momentum reconstruction in proton-proton collisions at 13 TeV using the CMS detector
- Jet pair production in POWHEG
- Matching Matrix Elements and Parton Showers with HERWIG and PYTHIA
- Missing transverse energy performance of the CMS detector
- The performance of the CMS muon detector in proton-proton collisions at sqrt(s) = 7 TeV at the LHC
- Performance of the CMS missing transverse energy reconstruction in pp data at sqrt(s) = 8 TeV
- Measurement of the Underlying Event Activity at the LHC with sqrt(s)= 7 TeV and Comparison with sqrt(s) = 0.9 TeV
- Measurement of the inelastic proton-proton cross section at sqrt(s) = 7 TeV
- Measurement and QCD analysis of double-differential inclusive jet cross-sections in pp collisions at sqrt(s) = 8 TeV and ratios to 2.76 and 7 TeV
- Measurement of the double-differential inclusive jet cross section in proton-proton collisions at sqrt(s) = 13 TeV
- Probing color coherence effects in pp collisions at sqrt(s) = 7 TeV
- Color Coherent Radiation in Multijet Events from ppbar Collisions at sqrt(s) = 1.8 TeV