ATLAS, Collaboration; Agustoni, Marco; Ancu, Lucian; Beck, Hans Peter; Borer, Claudia; Cervelli, Alberto; Ereditato, Antonio; Gallo, Valentina; Haug, Sigve; Kruker, Tobias; Marti, Lukas; Schneider, Basil; Weber, Michael (2013). Measurement of Top Quark Polarization in Top-Antitop Events from Proton-Proton Collisions at s√=7 TeV Using the ATLAS Detector. Physical review letters, 111(23) American Physical Society 10.1103/PhysRevLett.111.232002
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his Letter presents measurements of the polarization of the top quark in top-antitop quark pair events, using 4.7 fb−1 of proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider at s√=7 TeV. Final states containing one or two isolated leptons (electrons or muons) and jets are considered. Two measurements of αℓP, the product of the leptonic spin-analyzing power and the top quark polarization, are performed assuming that the polarization is introduced by either a CP conserving or a maximally CP violating production process. The measurements obtained, αℓPCPC=−0.035±0.014(stat)±0.037(syst) and αℓPCPV=0.020±0.016(stat)+0.013−0.017(syst), are in good agreement with the standard model prediction of negligible top quark polarization.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) 08 Faculty of Science > Physics Institute |
UniBE Contributor: |
Agustoni, Marco, Ancu, Lucian, Beck, Hans Peter, Borer, Claudia, Cervelli, Alberto, Ereditato, Antonio, Gallo, Valentina, Haug, Sigve, Kruker, Tobias, Marti, Lukas, Schneider, Basil, Weber, Michele |
Subjects: |
500 Science > 530 Physics |
ISSN: |
0031-9007 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
Users 22 not found. |
Date Deposited: |
23 Jul 2014 16:40 |
Last Modified: |
05 Dec 2022 14:36 |
Publisher DOI: |
10.1103/PhysRevLett.111.232002 |
Web of Science ID: |
000328616300013 |
ArXiv ID: |
1307.6511v2 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt. |
BORIS DOI: |
10.7892/boris.54902 |
URI: |
https://boris.unibe.ch/id/eprint/54902 |
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