Observation of spin correlation in tt [bar] events from pp collisions at √s=7 TeV using the ATLAS detector
A measurement of spin correlation in t¯t 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 diffe...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
24 May 2012
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| In: |
Physical review letters
Year: 2012, Jahrgang: 108, Heft: 21 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.108.212001 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevLett.108.212001 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.108.212001 
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| Verfasserangaben: | G. Aad et al.* (ATLAS Collaboration) |
MARC
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| 245 | 1 | 0 | |a Observation of spin correlation in tt [bar] events from pp collisions at √s=7 TeV using the ATLAS detector |c G. Aad et al.* (ATLAS Collaboration) |
| 246 | 3 | 0 | |a sqrt t̄ |
| 246 | 3 | 3 | |a Observation of spin correlation in tt bar events from pp collisions at square root s = 7 TeV using the ATLAS detector |
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| 500 | |a G. Aad, G. Anders, V. Andrei, Y. Davygora, T.A. Dietzsch, C. Geweniger, P. Hanke, A. Khomich, E.-E. Kluge, A. Kugel, R. Maenner, K. Meier, F. Müller, S. Poddar, S. Schaetzel, V. Scharf, S. Schmitt, A. Schöning, S. Schmitt, N. Schroer, H.-C. Schultz-Coulon, R. Stamen, M. Wessels [und weitere] | ||
| 500 | |a Gesehen am 29.11.2018 | ||
| 520 | |a A measurement of spin correlation in t¯t 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. | ||
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