Measurement of spin correlation in top-antitop quark events and search for top squark pair production in pp collisions at √s = 8 TeV using the ATLAS detector
A measurement of spin correlation in t¯t production is presented using data collected with the ATLAS detector at the Large Hadron Collider in proton-proton collisions at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 20.3 fb−1. The correlation between the top and ant...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
8 April 2015
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| In: |
Physical review letters
Year: 2015, Jahrgang: 114, Heft: 14, Pages: 1-19 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.114.142001 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.114.142001 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.114.142001 
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| Verfasserangaben: | G. Aad et al.* (ATLAS Collaboration) |
MARC
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| 245 | 1 | 0 | |a Measurement of spin correlation in top-antitop quark events and search for top squark pair production in pp collisions at √s = 8 TeV using the ATLAS detector |c G. Aad et al.* (ATLAS Collaboration) |
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| 246 | 3 | 3 | |a Measurement of spin correlation in top-antitop quark events and search for top squark pair production in proton-proton collisions at square root s = 8 TeV using the ATLAS detector |
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| 500 | |a *ATLAS Collaboration: G. Aad, C.F. Anders, V. Andrei, A. Baas, O. Brandt, J.I. Djuvsland, M. Dunford, P. Hanke, J. Jongmanns, E.-E. Kluge, A. Kugel, V. Lang, K. Meier, S. Schaetzel, V. Scharf, S. Schmitt, A. Schoening, H.-C. Schultz-Coulon, R. Stamen, M. Wessels [und 2858 weitere Personen] | ||
| 500 | |a Im Titel steht der Buchstabe s unter dem Wurzelsymbol | ||
| 500 | |a Gesehen am 13.07.2021 | ||
| 520 | |a A measurement of spin correlation in t¯t production is presented using data collected with the ATLAS detector at the Large Hadron Collider in proton-proton collisions at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 20.3 fb−1. The correlation between the top and antitop quark spins is extracted from dilepton t¯t events by using the difference in the azimuthal angle between the two charged leptons in the laboratory frame. In the helicity basis the measured degree of correlation corresponds to Ahelicity=0.38±0.04, in agreement with the standard model prediction. A search is performed for pair production of top squarks with masses close to the top quark mass decaying to predominantly right-handed top quarks and a light neutralino, the lightest supersymmetric particle. Top squarks with masses between the top quark mass and 191 GeV are excluded at the 95% confidence level. | ||
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