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Measurement of colour flow using jet-pull observables in tt¯ events with the ATLAS experiment at √s=13TeV
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0001-6945-1916
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0003-3867-0336
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0002-8015-7512
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Rekke forfattare: 28342019 (engelsk)Inngår i: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 78, nr 10Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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

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Springer, 2019. Vol. 78, nr 10
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Identifikatorer
URN: urn:nbn:se:kth:diva-250804DOI: 10.1140/epjc/s10052-018-6290-2ISI: 000448080300001Scopus ID: 2-s2.0-85055343357OAI: oai:DiVA.org:kth-250804DiVA, id: diva2:1313988
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QC 20190507

Tilgjengelig fra: 2019-05-07 Laget: 2019-05-07 Sist oppdatert: 2019-05-07bibliografisk kontrollert

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