Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/101923
Citations
Scopus Web of Science® Altmetric
?
?
Type: Journal article
Title: Observation of spin correlation in tt⁻ events from pp collisions at √s = 7  TeV using the ATLAS Detector
Other Titles: Observation of spin correlation in tt(-) events from pp collisions at root s = 7TeV using the ATLAS Detector
Author: Aad, G.
ATLAS Collaboration
Citation: Physical Review Letters, 2012; 108(21):212001-1-212001-19
Publisher: American Physical Society
Issue Date: 2012
ISSN: 1079-7114
1079-7114
Statement of
Responsibility: 
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M.J. White ... et al. (ATLAS Collaboration)
Abstract: A measurement of spin correlation in tt⁻ production is reported using data collected with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 2.1  fb⁻¹. Candidate events are selected in the dilepton topology with large missing transverse energy and at least two jets. The difference in azimuthal angle between the two charged leptons in the laboratory frame is used to extract the correlation between the top and antitop quark spins. In the helicity basis the measured degree of correlation corresponds to Ahelicity=0.40+0.09−0.08, in agreement with the next-to-leading-order standard model prediction. The hypothesis of zero spin correlation is excluded at 5.1 standard deviations.
Keywords: ATLAS Collaboration; ATLAS Collaboration; ATLAS Collaboration; ATLAS Collaboration
Rights: © 2012 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: 0020132669
DOI: 10.1103/PhysRevLett.108.212001
Appears in Collections:Physics publications

Files in This Item:
File Description SizeFormat 
hdl_101923.pdfPublished version600.02 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.