Measurements of spin correlation in top-antitop quark events from proton-proton collisions at √s=7 TeV using the ATLAS detector

ATLAS Collaboration

doi:10.1103/PhysRevD.90.112016

Measurements of spin correlation in top-antitop quark events from proton-proton collisions at √s=7 TeV using the ATLAS detector

ATLAS Collaboration

Physics and Astronomy

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Abstract

Measurements of spin correlation in top quark pair production are presented using data collected with the ATLAS detector at the LHC with proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 4.6 fb$^{-1}$. Events are selected in final states with two charged leptons and at least two jets and in final states with one charged lepton and at least four jets. Four different observables sensitive to different properties of the top quark pair production mechanism are used to extract the correlation between the top and antitop quark spins. Some of these observables are measured for the first time. The measurements are in good agreement with the Standard Model prediction at next-to-leading-order accuracy.

Original language	English
Journal	Physical Review D
Volume	90
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.90.112016
Publication status	Published - 24 Dec 2014

Bibliographical note

20 pages plus author list + cover pages (33 pages total), 10 figures, 6 tables, submitted to Phys. Rev. D, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2013-01/

Keywords

hep-ex

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10.1103/PhysRevD.90.112016Licence: Creative Commons: Attribution (CC BY)

ATLAS_Collaboration_&_Hawkes_Measurements_of_spin_Physical_Review_D
Article was originally published in Physical Review D (Vol. 90, Issue. 11) on 24/12/2014. Full article found at https://doi.org/10.1103/PhysRevD.90.112016
Final published version, 908 KBLicence: Creative Commons: Attribution (CC BY)

http://journals.aps.org/prd/pdf/10.1103/PhysRevD.90.112016Licence: Creative Commons: Attribution (CC BY)

Cite this

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title = "Measurements of spin correlation in top-antitop quark events from proton-proton collisions at √s=7 TeV using the ATLAS detector",

abstract = "Measurements of spin correlation in top quark pair production are presented using data collected with the ATLAS detector at the LHC with proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 4.6 fb$^{-1}$. Events are selected in final states with two charged leptons and at least two jets and in final states with one charged lepton and at least four jets. Four different observables sensitive to different properties of the top quark pair production mechanism are used to extract the correlation between the top and antitop quark spins. Some of these observables are measured for the first time. The measurements are in good agreement with the Standard Model prediction at next-to-leading-order accuracy.",

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author = "{ATLAS Collaboration} and Christopher Hawkes",

note = "20 pages plus author list + cover pages (33 pages total), 10 figures, 6 tables, submitted to Phys. Rev. D, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2013-01/",

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AB - Measurements of spin correlation in top quark pair production are presented using data collected with the ATLAS detector at the LHC with proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 4.6 fb$^{-1}$. Events are selected in final states with two charged leptons and at least two jets and in final states with one charged lepton and at least four jets. Four different observables sensitive to different properties of the top quark pair production mechanism are used to extract the correlation between the top and antitop quark spins. Some of these observables are measured for the first time. The measurements are in good agreement with the Standard Model prediction at next-to-leading-order accuracy.

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JO - Physical Review D

JF - Physical Review D

IS - 11

ER -

Measurements of spin correlation in top-antitop quark events from proton-proton collisions at √s=7 TeV using the ATLAS detector

Abstract

Bibliographical note

Keywords

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