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

ATLAS Collaboration

Research output: Contribution to journalArticle

10 Citations (Scopus)

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.

Original languageEnglish
Article number847
JournalEuropean Physical Journal C
Volume78
Issue number10
DOIs
Publication statusPublished - 2018 Oct 1

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Measurement of colour flow using jet-pull observables in tt¯ events with the ATLAS experiment at √s=13TeV'. Together they form a unique fingerprint.

  • Cite this