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Measurement of colour flow using jet-pull observables in tt¯ events with the ATLAS experiment at √s=13TeV

Aaboud, M ; Åkesson, Torsten LU orcid ; Bocchetta, Simona LU ; Corrigan, Eric LU ; Doglioni, Caterina LU ; Brottmann Hansen, Eva LU ; Hedberg, Vincent LU ; Jarlskog, Göran LU ; Kalderon, Charles LU and Kellermann, Edgar LU , et al. (2018) In European Physical Journal C 78(10).
Abstract
Previous studies have shown that weighted angular moments derived from jet constituents encode the colour connections between partons that seed the jets. This paper presents measurements of two such distributions, the jet-pull angle and jet-pull magnitude, both of which are derived from the jet-pull angular moment. The measurement is performed in tt¯ events with one leptonically decaying W boson and one hadronically decaying W boson, using 36.1fb-1 of pp collision data recorded by the ATLAS detector at s=13TeV delivered by the Large Hadron Collider. The observables are measured for two dijet systems, corresponding to the colour-connected daughters of the W boson and the two b-jets from the top-quark decays, which are not expected to be... (More)
Previous studies have shown that weighted angular moments derived from jet constituents encode the colour connections between partons that seed the jets. This paper presents measurements of two such distributions, the jet-pull angle and jet-pull magnitude, both of which are derived from the jet-pull angular moment. The measurement is performed in tt¯ events with one leptonically decaying W boson and one hadronically decaying W boson, using 36.1fb-1 of pp collision data recorded by the ATLAS detector at s=13TeV delivered by the Large Hadron Collider. The observables are measured for two dijet systems, corresponding to the colour-connected daughters of the W boson and the two b-jets from the top-quark decays, which are not expected to be colour connected. To allow the comparison of the measured distributions to colour model predictions, the measured distributions are unfolded to particle level, after correcting for experimental effects introduced by the detector. While good agreement can be found for some combinations of predictions and observables, none of the predictions describes the data well across all observables. © 2018, CERN for the benefit of the ATLAS collaboration. (Less)
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publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal C
volume
78
issue
10
article number
847
publisher
Springer
external identifiers
  • scopus:85055343357
ISSN
1434-6044
DOI
10.1140/epjc/s10052-018-6290-2
language
English
LU publication?
yes
additional info
Export Date: 16 November 2018
id
a4ceff90-4841-4445-9604-6e5d5a0e3023
date added to LUP
2018-11-16 11:54:12
date last changed
2021-10-06 04:24:25
@article{a4ceff90-4841-4445-9604-6e5d5a0e3023,
  abstract     = {Previous studies have shown that weighted angular moments derived from jet constituents encode the colour connections between partons that seed the jets. This paper presents measurements of two such distributions, the jet-pull angle and jet-pull magnitude, both of which are derived from the jet-pull angular moment. The measurement is performed in tt¯ events with one leptonically decaying W boson and one hadronically decaying W boson, using 36.1fb-1 of pp collision data recorded by the ATLAS detector at s=13TeV delivered by the Large Hadron Collider. The observables are measured for two dijet systems, corresponding to the colour-connected daughters of the W boson and the two b-jets from the top-quark decays, which are not expected to be colour connected. To allow the comparison of the measured distributions to colour model predictions, the measured distributions are unfolded to particle level, after correcting for experimental effects introduced by the detector. While good agreement can be found for some combinations of predictions and observables, none of the predictions describes the data well across all observables. © 2018, CERN for the benefit of the ATLAS collaboration.},
  author       = {Aaboud, M and Åkesson, Torsten and Bocchetta, Simona and Corrigan, Eric and Doglioni, Caterina and Brottmann Hansen, Eva and Hedberg, Vincent and Jarlskog, Göran and Kalderon, Charles and Kellermann, Edgar and Konya, Balazs and Lytken, Else and Mankinen, Katja and Mjörnmark, Ulf and Pöttgen, Ruth and Poulsen, Trine and Smirnova, Oxana and Viazlo, Oleksandr and Zwalinski, L},
  issn         = {1434-6044},
  language     = {eng},
  number       = {10},
  publisher    = {Springer},
  series       = {European Physical Journal C},
  title        = {Measurement of colour flow using jet-pull observables in tt¯ events with the ATLAS experiment at √s=13TeV},
  url          = {http://dx.doi.org/10.1140/epjc/s10052-018-6290-2},
  doi          = {10.1140/epjc/s10052-018-6290-2},
  volume       = {78},
  year         = {2018},
}