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Publication . Article . Other literature type . Preprint . Research . 2022

Study of quark and gluon jet substructure in Z+jet and dijet events from pp collisions

Tumasyan, Armen; Adam, Wolfgang; Lechner, Lukas; Hensel, Carsten; Kim, Dong Hee; Kim, Gui Nyun; Kim, Jiwoong; +536 Authors
Open Access

Measurements of jet substructure describing the composition of quark- and gluon-initiated jets are presented. Proton-proton (pp) collision data at √s = 13 TeV collected with the CMS detector are used, corresponding to an integrated luminosity of 35.9 fb−1. Generalized angularities are measured that characterize the jet substructure and distinguish quark- and gluon-initiated jets. These observables are sensitive to the distributions of transverse momenta and angular distances within a jet. The analysis is performed using a data sample of dijet events enriched in gluon-initiated jets, and, for the first time, a Z+jet event sample enriched in quark-initiated jets. The observables are measured in bins of jet transverse momentum, and as a function of the jet radius parameter. Each measurement is repeated applying a “soft drop” grooming procedure that removes soft and large angle radiation from the jet. Using these measurements, the ability of various models to describe jet substructure is assessed, showing a clear need for improvements in Monte Carlo generators.

Journal of High Energy Physics, 2022 (1)



Subjects by Vocabulary

Dewey Decimal Classification: ddc:530

arXiv: High Energy Physics::Experiment Astrophysics::High Energy Astrophysical Phenomena High Energy Physics::Phenomenology Nuclear Experiment


Physics, Particle Physics - Experiment, 530 Physics, 10192 Physics Institute, 3106 Nuclear and High Energy Physics, Hadron-Hadron Scattering, Jet Physics, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798, colliding beams [p p], hadroproduction [jet], associated production [Z0], hadroproduction [dijet], jet [gluon], transverse momentum [jet], scattering [p p], structure, jet [shape analysis], Monte Carlo [numerical calculations], jet [quark], CERN LHC Coll, CMS, wide-angle, experimental results, 13000 GeV-cms, Hadron-Hadron Scattering, Jet Physics, gluon, jet, jet, transverse momentum, p p, scattering, structure, dijet, Monte Carlo, quark, TeV, CMS, wide-angle, Hadron-Hadron Scattering; Jet Physics, 114 Physical sciences, FRAGMENTATION, gluon, jet, jet, transverse momentum, p p, scattering, dijet, Monte Carlo, quark, TeV, 530, p p: colliding beams, jet: hadroproduction, Z0: associated production, dijet: hadroproduction, gluon: jet, jet: transverse momentum, p p: scattering, shape analysis: jet, numerical calculations: Monte Carlo, quark: jet, CERN LHC Coll, experimental results, 13000 GeV-cms, hep-ex, High Energy Physics - Experiment, Science & Technology, Physical Sciences, Physics, Particles & Fields, Physics, Nuclear & Particles Physics, 0105 Mathematical Physics, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, 0206 Quantum Physics, High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy, FRAGMENTATION, Nuclear and High Energy Physics

Funded by
EC| MajorNet
Majorana neutrino discovery strategy with CMS
  • Funder: European Commission (EC)
  • Project Code: 758316
  • Funding stream: H2020 | ERC | ERC-STG
EC| AMVA4NewPhysics
Advanced Multi-Variate Analysis for New Physics Searches at the LHC
  • Funder: European Commission (EC)
  • Project Code: 675440
  • Funding stream: H2020 | MSCA-ITN-ETN
International, Interdisciplinary & Intersectoral Postdoctoral Fellowships at the Paul Scherrer Institut
  • Funder: European Commission (EC)
  • Project Code: 884104
  • Funding stream: H2020 | MSCA-COFUND-FP
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