Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/115041
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Type: Journal article
Title: Measurement of the correlation between the polar angles of leptons from top quark decays in the helicity basis at √s = 7 TeV using the ATLAS detector
Other Titles: Measurement of the correlation between the polar angles of leptons from top quark decays in the helicity basis at root s = 7 TeV using the ATLAS detector
Author: Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Aben, R.
Abolins, M.
Abouzeid, O.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.
Adamczyk, L.
Adams, D.
Adelman, J.
Adomeit, S.
Adye, T.
Affolder, A.
Agatonovic-Jovin, T.
Agricola, J.
et al.
Citation: Physical Review D, 2016; 93(1):012002-1-012002-23
Publisher: American Physical Society
Issue Date: 2016
ISSN: 2470-0010
2470-0029
Statement of
Responsibility: 
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N.Soni ... M.J. White ... [et al.] (The ATLAS Collaboration)
Abstract: A measurement of the correlations between the polar angles of leptons from the decay of pair-produced t and ¯t quarks in the helicity basis is reported, using proton-proton collision data collected by the ATLAS detector at the LHC. The dataset corresponds to an integrated luminosity of 4.6  fb⁻¹ at a center-of-mass energy of √s=7  TeV collected during 2011. Candidate events are selected in the dilepton topology with large missing transverse momentum and at least two jets. The angles θ₁ and θ₂ between the charged leptons and the direction of motion of the parent quarks in the t¯t rest frame are sensitive to the spin information, and the distribution of cosθ₁⋅cosθ₂ is sensitive to the spin correlation between the t and ¯t quarks. The distribution is unfolded to parton level and compared to the next-to-leading order prediction. A good agreement is observed.
Rights: © 2016 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
RMID: 0030042522
DOI: 10.1103/PhysRevD.93.012002
Appears in Collections:Physics publications

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