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  • PhysRevLett.108.212001

    Rights statement: 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. © 2012 CERN, for the ATLAS Collaboration

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Observation of Spin Correlation in tt¯ Events from pp Collisions at s√=7  TeV Using the ATLAS Detector

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Observation of Spin Correlation in tt¯ Events from pp Collisions at s√=7  TeV Using the ATLAS Detector. / The ATLAS collaboration.

In: Physical review letters, Vol. 108, No. 21, 212001, 24.05.2012.

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The ATLAS collaboration. / Observation of Spin Correlation in tt¯ Events from pp Collisions at s√=7  TeV Using the ATLAS Detector. In: Physical review letters. 2012 ; Vol. 108, No. 21.

Bibtex

@article{dc9c6d3ebfbc4e5b87bfc912479f0178,
title = "Observation of Spin Correlation in tt¯ Events from pp Collisions at s√=7  TeV Using the ATLAS Detector",
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.",
author = "Adam Barton and Guennadi Borissov and Eva Bouhova-Thacker and Timothy Brodbeck and Alexandre Chilingarov and Ruth Davidson and {de Mora}, Lee and William Dearnaley and Harald Fox and Robert Henderson and Gareth Hughes and Jones, {Roger William Lewis} and Vakhtang Kartvelishvili and Robin Long and Peter Love and Peter Ratoff and Maria Smizanska and James Walder and {The ATLAS collaboration}",
note = "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{\textquoteright}s title, journal citation, and DOI. {\textcopyright} 2012 CERN, for the ATLAS Collaboration",
year = "2012",
month = may,
day = "24",
doi = "10.1103/PhysRevLett.108.212001",
language = "English",
volume = "108",
journal = "Physical review letters",
issn = "1079-7114",
publisher = "American Physical Society",
number = "21",

}

RIS

TY - JOUR

T1 - Observation of Spin Correlation in tt¯ Events from pp Collisions at s√=7  TeV Using the ATLAS Detector

AU - Barton, Adam

AU - Borissov, Guennadi

AU - Bouhova-Thacker, Eva

AU - Brodbeck, Timothy

AU - Chilingarov, Alexandre

AU - Davidson, Ruth

AU - de Mora, Lee

AU - Dearnaley, William

AU - Fox, Harald

AU - Henderson, Robert

AU - Hughes, Gareth

AU - Jones, Roger William Lewis

AU - Kartvelishvili, Vakhtang

AU - Long, Robin

AU - Love, Peter

AU - Ratoff, Peter

AU - Smizanska, Maria

AU - Walder, James

AU - The ATLAS collaboration

N1 - 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. © 2012 CERN, for the ATLAS Collaboration

PY - 2012/5/24

Y1 - 2012/5/24

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevLett.108.212001

DO - 10.1103/PhysRevLett.108.212001

M3 - Journal article

VL - 108

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

IS - 21

M1 - 212001

ER -