Measurement of colour flow using jet-pull observables in in t(t)over-bar events with the ATLAS experiment at root s=13TeV

M. Aaboud; G. Aad; B. Abbott; O. Abdinov; B Abeloos; S.H. Abidi; Ossama Sherif Alexander Abouzeid; NL Abraham; H. Abramowicz; H. Abreu; Y. Abulaiti; B.S. Acharya; Sosuke Adachi; L. Adamczyk; M. Adersberger; T. Adye; A. A. Affolder; Y.  Afik; C. Agheorghiesei; Alejandro Alonso Diaz; Geert-Jan Besjes; Milena Bajic; Mogens Dam; Flavia de Almeida Dias; Gorm Aske Gram Krohn Galster; Jørgen Beck Hansen; James William Monk; Peter Henrik Hansen; Jørn Dines Hansen; Troels Christian Petersen; Graig Wiglesworth; Fabian Alexander Jürgen Thiele; Simon Holm Stark; Stefania Xella

doi:10.1140/epjc/s10052-018-6290-2

Measurement of colour flow using jet-pull observables in in t(t)over-bar events with the ATLAS experiment at root s=13TeV

M. Aaboud, G. Aad, B. Abbott, O. Abdinov, B Abeloos, S.H. Abidi, Ossama Sherif Alexander Abouzeid, NL Abraham, H. Abramowicz, H. Abreu, Y. Abulaiti, B.S. Acharya, Sosuke Adachi, L. Adamczyk, M. Adersberger, T. Adye, A. A. Affolder, Y. Afik, C. Agheorghiesei, Alejandro Alonso DiazGeert-Jan Besjes, Milena Bajic, Mogens Dam, Flavia de Almeida Dias, Gorm Aske Gram Krohn Galster, Jørgen Beck Hansen, James William Monk, Peter Henrik Hansen, Jørn Dines Hansen, Troels Christian Petersen, Graig Wiglesworth, Fabian Alexander Jürgen Thiele, Simon Holm Stark, Stefania Xella

Experimental Particle Physics

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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 language	English
Article number	847
Journal	European Physical Journal C
Volume	78
Issue number	10
Number of pages	31
ISSN	1434-6044
DOIs	https://doi.org/10.1140/epjc/s10052-018-6290-2
Publication status	Published - 1 Oct 2018

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Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abidi, S. H., Abouzeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Adachi, S., Adamczyk, L., Adersberger, M., Adye, T., Affolder, A. A., Afik, Y., Agheorghiesei, C., ... Xella, S. (2018). Measurement of colour flow using jet-pull observables in in t(t)over-bar events with the ATLAS experiment at root s=13TeV. European Physical Journal C, 78(10), [847]. https://doi.org/10.1140/epjc/s10052-018-6290-2

Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abidi, SH, Abouzeid, OSA, Abraham, NL, Abramowicz, H, Abreu, H, Abulaiti, Y, Acharya, BS, Adachi, S, Adamczyk, L, Adersberger, M, Adye, T, Affolder, AA, Afik, Y, Agheorghiesei, C, Alonso Diaz, A, Besjes, G-J, Bajic, M, Dam, M, de Almeida Dias, F, Galster, GAGK, Hansen, JB, Monk, JW, Hansen, PH , Hansen, JD , Petersen, TC , Wiglesworth, G, Thiele, FAJ, Stark, SH & Xella, S 2018, 'Measurement of colour flow using jet-pull observables in in t(t)over-bar events with the ATLAS experiment at root s=13TeV', European Physical Journal C, vol. 78, no. 10, 847. https://doi.org/10.1140/epjc/s10052-018-6290-2

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title = "Measurement of colour flow using jet-pull observables in in t(t)over-bar events with the ATLAS experiment at root s=13TeV",

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.",

author = "M. Aaboud and G. Aad and B. Abbott and O. Abdinov and B Abeloos and S.H. Abidi and Abouzeid, {Ossama Sherif Alexander} and NL Abraham and H. Abramowicz and H. Abreu and Y. Abulaiti and B.S. Acharya and Sosuke Adachi and L. Adamczyk and M. Adersberger and T. Adye and Affolder, {A. A.} and Y. Afik and C. Agheorghiesei and {Alonso Diaz}, Alejandro and Geert-Jan Besjes and Milena Bajic and Mogens Dam and {de Almeida Dias}, Flavia and Galster, {Gorm Aske Gram Krohn} and Hansen, {J{\o}rgen Beck} and Monk, {James William} and Hansen, {Peter Henrik} and Hansen, {J{\o}rn Dines} and Petersen, {Troels Christian} and Graig Wiglesworth and Thiele, {Fabian Alexander J{\"u}rgen} and Stark, {Simon Holm} and Stefania Xella",

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T1 - Measurement of colour flow using jet-pull observables in in t(t)over-bar events with the ATLAS experiment at root s=13TeV

AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Abdinov, O.

AU - Abeloos, B

AU - Abidi, S.H.

AU - Abouzeid, Ossama Sherif Alexander

AU - Abraham, NL

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B.S.

AU - Adachi, Sosuke

AU - Adamczyk, L.

AU - Adersberger, M.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agheorghiesei, C.

AU - Alonso Diaz, Alejandro

AU - Besjes, Geert-Jan

AU - Bajic, Milena

AU - Dam, Mogens

AU - de Almeida Dias, Flavia

AU - Galster, Gorm Aske Gram Krohn

AU - Hansen, Jørgen Beck

AU - Monk, James William

AU - Hansen, Peter Henrik

AU - Hansen, Jørn Dines

AU - Petersen, Troels Christian

AU - Wiglesworth, Graig

AU - Thiele, Fabian Alexander Jürgen

AU - Stark, Simon Holm

AU - Xella, Stefania

PY - 2018/10/1

Y1 - 2018/10/1

N2 - 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.

AB - 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.

U2 - 10.1140/epjc/s10052-018-6290-2

DO - 10.1140/epjc/s10052-018-6290-2

M3 - Journal article

C2 - 30934029

SN - 1434-6044

VL - 78

JO - The European Physical Journal C: Particles and Fields

JF - The European Physical Journal C: Particles and Fields

IS - 10

M1 - 847

ER -

Measurement of colour flow using jet-pull observables in in t(t)over-bar events with the ATLAS experiment at root s=13TeV

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