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Measurement of Suppression of Large-Radius Jets and Its Dependence on Substructure in Pb+Pb Collisions at √sNN=5.02 TeV with the ATLAS Detector

Aad, G ; Åkesson, Torsten LU orcid ; Doglioni, Caterina LU ; Ekman, Alexander LU ; Hedberg, Vincent LU ; Herde, Hannah LU orcid ; Konya, Balazs LU ; Lytken, Else LU orcid ; Pöttgen, Ruth LU orcid and Simpson, Nathan Daniel LU , et al. (2023) In Physical Review Letters 131(17).
Abstract
This letter presents a measurement of the nuclear modification factor of large-radius jets in Formula Presented Formula Presented collisions by the ATLAS experiment. The measurement is performed using Formula Presented and Formula Presented of Formula Presented and Formula Presented data, respectively. The large-radius jets are reconstructed with the anti-Formula Presented algorithm using a radius parameter of Formula Presented, by reclustering anti-Formula Presented Formula Presented jets, and are measured over the transverse momentum (Formula Presented) kinematic range of Formula Presented and absolute pseudorapidity Formula Presented. The large-radius jet constituents are further reclustered using the Formula Presented algorithm in... (More)
This letter presents a measurement of the nuclear modification factor of large-radius jets in Formula Presented Formula Presented collisions by the ATLAS experiment. The measurement is performed using Formula Presented and Formula Presented of Formula Presented and Formula Presented data, respectively. The large-radius jets are reconstructed with the anti-Formula Presented algorithm using a radius parameter of Formula Presented, by reclustering anti-Formula Presented Formula Presented jets, and are measured over the transverse momentum (Formula Presented) kinematic range of Formula Presented and absolute pseudorapidity Formula Presented. The large-radius jet constituents are further reclustered using the Formula Presented algorithm in order to obtain the splitting parameters, Formula Presented and Formula Presented, which characterize the transverse momentum scale and angular separation for the hardest splitting in the jet, respectively. The nuclear modification factor, Formula Presented, obtained by comparing the Formula Presented jet yields to those in Formula Presented collisions, is measured as a function of jet transverse momentum (Formula Presented) and Formula Presented or Formula Presented. A significant difference in the quenching of large-radius jets having single subjet and those with more complex substructure is observed. Systematic comparison of jet suppression in terms of Formula Presented for different jet definitions is also provided. Presented results support the hypothesis that jets with hard internal splittings lose more energy through quenching and provide a new perspective for understanding the role of jet structure in jet suppression. © 2023 CERN, for the ATLAS Collaboration. (Less)
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type
Contribution to journal
publication status
published
subject
keywords
Momentum, Parameter estimation, ATLAS detectors, ATLAS experiment, Kinematic range, Measurements of, Nuclear modification factors, Pb-Pb collisions, Pseudorapidities, Re-clustering, Splittings, Transverse momenta, Quenching
in
Physical Review Letters
volume
131
issue
17
article number
172301
publisher
American Physical Society
external identifiers
  • scopus:85176743787
  • pmid:37955510
ISSN
1079-7114
DOI
10.1103/PhysRevLett.131.172301
language
English
LU publication?
yes
id
9ebc7e83-e9a9-4f53-a138-b21fa25c7f89
date added to LUP
2024-03-25 15:22:13
date last changed
2024-03-26 03:09:09
@article{9ebc7e83-e9a9-4f53-a138-b21fa25c7f89,
  abstract     = {{This letter presents a measurement of the nuclear modification factor of large-radius jets in Formula Presented Formula Presented collisions by the ATLAS experiment. The measurement is performed using Formula Presented and Formula Presented of Formula Presented and Formula Presented data, respectively. The large-radius jets are reconstructed with the anti-Formula Presented algorithm using a radius parameter of Formula Presented, by reclustering anti-Formula Presented Formula Presented jets, and are measured over the transverse momentum (Formula Presented) kinematic range of Formula Presented and absolute pseudorapidity Formula Presented. The large-radius jet constituents are further reclustered using the Formula Presented algorithm in order to obtain the splitting parameters, Formula Presented and Formula Presented, which characterize the transverse momentum scale and angular separation for the hardest splitting in the jet, respectively. The nuclear modification factor, Formula Presented, obtained by comparing the Formula Presented jet yields to those in Formula Presented collisions, is measured as a function of jet transverse momentum (Formula Presented) and Formula Presented or Formula Presented. A significant difference in the quenching of large-radius jets having single subjet and those with more complex substructure is observed. Systematic comparison of jet suppression in terms of Formula Presented for different jet definitions is also provided. Presented results support the hypothesis that jets with hard internal splittings lose more energy through quenching and provide a new perspective for understanding the role of jet structure in jet suppression. © 2023 CERN, for the ATLAS Collaboration.}},
  author       = {{Aad, G and Åkesson, Torsten and Doglioni, Caterina and Ekman, Alexander and Hedberg, Vincent and Herde, Hannah and Konya, Balazs and Lytken, Else and Pöttgen, Ruth and Simpson, Nathan Daniel and Skorda, Eleni and Smirnova, Oxana and Zwalinski, L.}},
  issn         = {{1079-7114}},
  keywords     = {{Momentum; Parameter estimation; ATLAS detectors; ATLAS experiment; Kinematic range; Measurements of; Nuclear modification factors; Pb-Pb collisions; Pseudorapidities; Re-clustering; Splittings; Transverse momenta; Quenching}},
  language     = {{eng}},
  number       = {{17}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Measurement of Suppression of Large-Radius Jets and Its Dependence on Substructure in Pb+Pb Collisions at √sNN=5.02 TeV with the ATLAS Detector}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.131.172301}},
  doi          = {{10.1103/PhysRevLett.131.172301}},
  volume       = {{131}},
  year         = {{2023}},
}