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Measurements of multijet event isotropies using optimal transport with the ATLAS detector ATLAS Collaboration
Abstract
A measurement of novel event shapes quantifying the isotropy of collider events is performed in 140 fb−1 of proton-proton collisions with √ s = 13 TeV centre-of-mass energy recorded with the ATLAS detector at CERN’s Large Hadron Collider. These event shapes are defined as the Wasserstein distance between collider events and isotropic reference geometries. This distance is evaluated by solving optimal transport problems, using the ‘Energy-Mover’s Distance’. Isotropic references with cylindrical and circular symmetries are studied, to probe the symmetries of interest at hadron colliders. The novel event-shape observables defined in this way are infrared- and collinear-safe, have improved dynamic range and have greater sensitivity to isotropic radiation patterns than other event shapes. The measured event-shape variables are corrected for detector effects, and presented in inclusive bins of jet multiplicity and the scalar sum of the two leading jets’ transverse momenta. The measured distributions are provided as inputs to future Monte Carlo tuning campaigns and other studies probing fundamental properties of QCD and the production of hadronic final states up to the TeV-scale.
Item Metadata
Title |
Measurements of multijet event isotropies using optimal transport with the ATLAS detector
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Creator | |
Publisher |
Springer Berlin Heidelberg
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Date Issued |
2023-10-10
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Description |
A measurement of novel event shapes quantifying the isotropy of collider events
is performed in 140 fb−1 of proton-proton collisions with √
s = 13 TeV centre-of-mass energy
recorded with the ATLAS detector at CERN’s Large Hadron Collider. These event shapes
are defined as the Wasserstein distance between collider events and isotropic reference
geometries. This distance is evaluated by solving optimal transport problems, using the
‘Energy-Mover’s Distance’. Isotropic references with cylindrical and circular symmetries
are studied, to probe the symmetries of interest at hadron colliders. The novel event-shape
observables defined in this way are infrared- and collinear-safe, have improved dynamic
range and have greater sensitivity to isotropic radiation patterns than other event shapes.
The measured event-shape variables are corrected for detector effects, and presented in
inclusive bins of jet multiplicity and the scalar sum of the two leading jets’ transverse
momenta. The measured distributions are provided as inputs to future Monte Carlo tuning
campaigns and other studies probing fundamental properties of QCD and the production
of hadronic final states up to the TeV-scale.
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Subject | |
Genre | |
Type | |
Language |
eng
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Date Available |
2023-11-08
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution 4.0 International (CC BY 4.0)
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DOI |
10.14288/1.0437570
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URI | |
Affiliation | |
Citation |
Journal of High Energy Physics. 2023 Oct 10;2023(10):60
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Publisher DOI |
10.1007/JHEP10(2023)060
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Peer Review Status |
Reviewed
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Scholarly Level |
Faculty
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Copyright Holder |
The Author(s)
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
Attribution 4.0 International (CC BY 4.0)