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

UNSPECIFIED (2014) Measurements of spin correlation in top-antitop quark events from proton-proton collisions at s√=7  TeV using the ATLAS detector. Physical Review D, 90 (11): 112016. ISSN 1550-7998

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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.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
Additional Information:
© 2014 CERN, for the ATLAS Collaboration
ID Code:
73985
Deposited By:
Deposited On:
18 Jun 2015 05:58
Refereed?:
Yes
Published?:
Published
Last Modified:
14 Feb 2024 00:55