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Measurement of soft-drop jet observables in pp collisions with the ATLAS detector at √s =13 TeV

Contributors

ATLAS Collaboration

Collaborators

Adorni Braccesi Chiassi, Sofia; Akilli, Ece; Amrouche, Cherifa Sabrina; Antel, Claire; Benoit, Mathieu; Clark, Allan Geoffrey; Della Volpe, Domenico; Di Bello, Francesco Armando; Dubreuil, Arnaud; Ferrere, Didier; Gadatsch, Stefan; Golling, Tobias; Gonzalez Sevilla, Sergio; Iacobucci, Giuseppe; Iizawa, Tomoya; Jansky, Roland; Khoo, Teng Jian; Kiehn, Moritz; Lanfermann, Marie Christine; Lionti, Anthony Eric; Mermod, Philippe; Nessi, Marzio; Nindhito, Herjuno Rah; Paolozzi, Lorenzo; Poggi, Riccardo; Raine, Johnny; Salamani, Dalila; Schramm, Steven; Sfyrla, Anna; Sultan, D M S; Valente, Marco; Vicente Barreto Pinto, Mateus; Wu, Xin; Zaffaroni, Ettore

Published in

Physical review. D, vol. 101, no. 5, 052007

Publication date

2020

First online date

2020-03-17

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 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 αS. Other observables, such as the momentum sharing between the two subjets, are nearly independent of αS. 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 nonperturbative 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.

Keywords

  • Particle Physics Experiments
  • P p: scattering
  • P p: colliding beams
  • Jet: pair production
  • Gluon: jet
  • Quark: jet
  • Jet: mass
  • Singularity: collinear
  • Particle: interaction
  • Rapidity: difference
  • Parton: showers
  • Strong interaction: coupling constant
  • Numerical calculations: Monte Carlo
  • Quantum chromodynamics: perturbation theory
  • Rapidity dependence
  • ATLAS
  • CERN LHC Coll
  • Tracking detector
  • Charged particle
  • Strong coupling
  • Nonperturbative
  • Phase space
  • Structure
  • Dijet
  • Experimental results
  • 13000 GeV-cms

UNIGE affiliation entities

Citation (ISO format)

ATLAS Collaboration. Measurement of soft-drop jet observables in pp collisions with the ATLAS detector at √s =13 TeV. In: Physical review. D, 2020, vol. 101, n° 5, p. 052007. doi: 10.1103/physrevd.101.052007

Main files (1)

Article (Published version)
CC BY-4.0

Identifiers

Additional URL for this publication

https://link.aps.org/doi/10.1103/PhysRevD.101.052007

Journal ISSN

2470-0010
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34downloads

Technical informations

Creation

24/06/2024 08:02:43

First validation

25/06/2024 06:19:10

Update

13/10/2025 13:40:29

Status update

25/06/2024 06:19:10

Last indexation

10/11/2026 18:01:49
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