@Article{ATLASCollaborationAad_etal2012,
author="ATLAS Collaboration (Aad, G. et al
and Amoros, G.
and Cabrera Urban, S.
and Castillo Gimenez, V.
and Costa, M. J.
and Ferrer, A.
and Fiorini, L.
and Fuster, J.
and Garcia, C.
and Garcia Navarro, J. E.
and Gonzalez de la Hoz, S.
and Hernandez Jimenez, Y.
and Higon-Rodriguez, E.
and Irles Quiles, A.
and Kaci, M.
and Lacasta, C.
and Lacuesta, V. R.
and Marti-Garcia, S.
and Mi{\~A}{\textpm}ano, M.
and Mitsou, V. A.
and Moles-Valls, R.
and Moreno Llacer, M.
and Oliver Garcia, E.
and Perez Garcia-Esta{\~A}{\textpm}, M. T.
and Romero Adam, E.
and Ros, E.
and Salt, J.
and Sanchez Martinez, V.
and Solans, C. A.
and Soldevila, U.
and Sanchez, J.
and Torro Pastor, E.
and Valladolid Gallego, E.
and Valls Ferrer, J. A.
and Villaplana Perez, M.
and Vos, M.
and Wildauer, A.",
title="Observation of Spin Correlation in t(t)over-bar Events from pp Collisions at root s=7 TeV Using the ATLAS Detector",
journal="Physical Review Letters",
year="2012",
publisher="Amer Physical Soc",
volume="108",
number="21",
pages="212001 - 19pp",
abstract="A measurement of spin correlation in t (t) over bar 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 A(helicity) = 0.40(-0.08)(+0.09), in agreement with the next-to-leading-order standard model prediction. The hypothesis of zero spin correlation is excluded at 5.1 standard deviations.",
optnote="WOS:000304405000003",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1032), last updated on Thu, 14 Jun 2012 11:50:30 +0000",
issn="0031-9007",
doi="10.1103/PhysRevLett.108.212001",
opturl="http://arxiv.org/abs/1203.4081",
opturl="https://doi.org/10.1103/PhysRevLett.108.212001",
archivePrefix="arXiv",
eprint="1203.4081",
language="English"
}