A measurement of soft-drop jet observables in $pp$ collisions with the ATLAS detector at $\sqrt{s}=13$ TeV

Abstract

Jet substructure quantities are measured using jets groomed with the soft-drop grooming procedure in dijet events from 32.9 fb${}^{-1}$ of $pp$ collisions collected with the ATLAS detector at $\sqrt{s}=13$ TeV. These observables are sensitive to a wide range of QCD phenomena. Some observables, such as the jet mass and opening angle between the two subjets which pass the soft-drop condition, can be described by a high-order (resummed) series in the strong coupling constant ${\alpha }_S$. Other observables, such as the momentum sharing between the two subjets, are nearly independent of ${\alpha }_S$. These observables can be constructed using all interacting particles or using only charged particles reconstructed in the inner tracking detectors. Track-based versions of these observables are not collinear safe, but are measured more precisely, and universal non-perturbative functions can absorb the collinear singularities. The unfolded data are directly compared with QCD calculations and hadron-level Monte Carlo simulations. The measurements are performed in different pseudorapidity regions, which are then used to extract quark and gluon jet shapes using the predicted quark and gluon fractions in each region. All of the parton shower and analytical calculations provide an excellent description of the data in most regions of phase space.

arXiv comment53 pages in total, author list starting page 37, 17 figures, 1 table, published in Phys. Rev. D. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-33/

References in corpus (70)

• 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
• Parton distributions for the LHC
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• New parton distributions for collider physics
• Event generation with SHERPA 1.1
• Herwig++ Physics and Manual
• HERWIG 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes)
• Parton distributions with LHC data
• The ATLAS Simulation Infrastructure
• A General Algorithm for Calculating Jet Cross Sections in NLO QCD
• An effective field theory for collinear and soft gluons: heavy to light decays
• New parton distribution functions from a global analysis of quantum chromodynamics
• Soft-Collinear Factorization in Effective Field Theory
• QCD Matrix Elements + Parton Showers
• Better Jet Clustering Algorithms
• Event Generation with Sherpa 2.2
• Tuning PYTHIA 8.1: the Monash 2013 Tune
• Tuning Monte Carlo Generators: The Perugia Tunes
• Performance of the ATLAS Trigger System in 2015
• Soft Drop
• The Catchment Area of Jets
• Production and Integration of the ATLAS Insertable B-Layer
• Topological cell clustering in the ATLAS calorimeters and its performance in LHC Run 1
• Next-to-leading order calculation of three-jet observables in hadron-hadron collision
• Towards an understanding of jet substructure
• Resummation of non-global QCD observables
• Study of the material of the ATLAS inner detector for Run 2 of the LHC
• Jet energy scale measurements and their systematic uncertainties in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Jet Substructure at the Large Hadron Collider: A Review of Recent Advances in Theory and Machine Learning
• ATLAS data quality operations and performance for 2015-2018 data-taking
• Interleaved Parton Showers and Tuning Prospects
• Jet Substructure at the Large Hadron Collider: Experimental Review
• HERWIG 6.4 Release Note
• HERWIG 6.1 Release Note
• HERWIG 6.3 Release Note
• Sudakov Safety in Perturbative QCD
• Performance of the ATLAS Track Reconstruction Algorithms in Dense Environments in LHC Run 2
• Jet Charge at the LHC
• Factorization for groomed jet substructure beyond the next-to-leading logarithm
• Hadronization Corrections to Jet Cross Sections in Deep-Inelastic Scattering
• Constraining MPI models using sigma_effective and recent Tevatron and LHC Underlying Event data
• Measurement of the splitting function in pp and PbPb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=$ 5.02 TeV
• Calculating Track-Based Observables for the LHC
• Calculating the Charge of a Jet
• A study of jet mass distributions with grooming
• Early LHC Underlying Event Data - Findings and Surprises
• Exposing the QCD Splitting Function with CMS Open Data
• Exploration of jet substructure using iterative declustering in pp and Pb-Pb collisions at LHC energies
• A measurement of the soft-drop jet mass in pp collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Measurement of the charged-particle multiplicity inside jets from $\sqrt{s}=8$ TeV $pp$ collisions with the ATLAS detector
• The jet mass distribution after Soft Drop
• Measurements of the differential jet cross section as a function of the jet mass in dijet events from proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Soft drop groomed jet angularities at the LHC
• Measurement of jet substructure observables in $\mathrm{t}\overline{\mathrm{t}}$ events from proton-proton collisions at $\sqrt{s}=$ 13TeV
• Jet Substructure Studies with CMS Open Data
• Measurement of the groomed jet mass in PbPb and pp collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=$ 5.02 TeV
• The groomed and ungroomed jet mass distribution for inclusive jet production at the LHC
• A measurement of the calorimeter response to single hadrons and determination of the jet energy scale uncertainty using LHC Run-1 $pp$-collision data with the ATLAS detector
• Measurement of jet-substructure observables in top quark, $W$ boson and light jet production in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Precision physics with pile-up insensitive observables
• Nonperturbative Corrections to Soft Drop Jet Mass
• Generalized Fragmentation Functions for Fractal Jet Observables
• Investigating the Topology Dependence of Quark and Gluon Jets
• Measurements of the jet internal sub-structure and its relevance to parton shower evolution in p+p and Au+Au collisions at STAR

Cited by in corpus (38)

• The ALICE experiment: a journey through QCD
• Rethinking Jets with Energy Correlators: Tracks, Resummation and Analytic Continuation
• Quantum Interference in Jet Substructure from Spinning Gluons
• Measurement of the Lund jet plane using charged particles in 13 TeV proton-proton collisions with the ATLAS detector
• Extending Precision Perturbative QCD with Track Functions
• Optimisation of large-radius jet reconstruction for the ATLAS detector in 13 TeV proton-proton collisions
• Dynamically groomed jet radius in heavy-ion collisions
• Measurement of Groomed Jet Substructure Observables in \pp Collisions at $\sqrt{s}=200$ GeV with STAR
• Measurement of energy correlators inside jets and determination of the strong coupling ${\alpha }_{\mathrm{S}}(m_{\mathrm{Z}})$
• Disentangling Jet Modification in Jet Simulations and in Z+Jet Data
• Study of quark and gluon jet substructure in Z+jet and dijet events from pp collisions
• Measurement of substructure-dependent jet suppression in Pb+Pb collisions at 5.02 TeV with the ATLAS detector
• Identifying groomed jet splittings in heavy-ion collisions
• Groomed jet mass at high precision
• Measurements of the groomed and ungroomed jet angularities in pp collisions at $\sqrt{s}=5.02$ TeV
• Tagging the initial-state gluon
• Two- and Three-Loop Data for Groomed Jet Mass
• Dead-cone searches in heavy-ion collisions using the jet tree
• Dynamical grooming meets LHC data
• Exploring Jet Substructure in Semi-visible jets
• Identification of b-jets using QCD-inspired observables
• Performance of the ALICE Electromagnetic Calorimeter
• Tagging boosted hadronic objects with dynamical grooming
• The soft drop momentum sharing fraction $z_g$ beyond leading-logarithmic accuracy
• Revisiting the role of grooming in DIS
• Measurements of groomed-jet substructure of charm jets tagged by ${\mathrm{D}}^0$ mesons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Search for Higgs boson and observation of Z boson through their decay into a charm quark-antiquark pair in boosted topologies in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Accuracy versus precision in boosted top tagging with the ATLAS detector
• Measurement of groomed event shape observables in deep-inelastic electron-proton scattering at HERA
• Measurement of jet substructure in boosted $t\bar{t}$ events with the ATLAS detector using 140 fb${}^{-1}$ of 13 TeV $pp$ collisions
• Medium-induced modification of groomed and ungroomed jet mass and angularities in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Dynamical grooming at work: from p+p to Pb+Pb
• Effect of new jet substructure measurements on Pythia8 tunes
• D${}^0$-meson-tagged jet axes difference in proton-proton collisions at $\sqrt{\text{s}}=5.02$ TeV
• Energy Flow in Particle Collisions
• Variational inference for pile-up removal at hadron colliders with diffusion models
• Jet substructure of light and heavy flavor jets at RHIC
• Studying the QGP with Jets at the LHC and RHIC