Mullier, Geoffrey; Haug, Sigve; Weber, Michael; Meloni, Federico; Cervelli, Alberto; Beck, Hans Peter; Stucci, Stefania; Ereditato, Antonio (2016). Measurement of the correlations between the polar angles of leptons from top quark decays in the helicity basis at √s=7TeV using the ATLAS detector. Physical review. D - particles, fields, gravitation, and cosmology, D93(1), 012002. American Physical Society 10.1103/PhysRevD.93.012002
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1510.07478.pdf - Accepted Version Available under License Creative Commons: Attribution (CC-BY). Download (329kB) | Preview |
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PhysRevD.93.012002.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (424kB) | Preview |
A measurement of the correlations between the polar angles of leptons from the decay of pair-produced t and t quarks in the helicity basis is reported, using proton-proton collision data collected by the ATLAS detector at the LHC. The dataset corresponds to an integrated luminosity of 4.6fb⁻¹ at a center-of-mass energy of √s=7 TeV collected during 2011. Candidate events are selected in the dilepton topology with large missing transverse momentum and at least two jets. The angles θ₁ and θ₂ between the charged leptons and the direction of motion of the parent quarks in the tt rest frame are sensitive to the spin information, and the distribution of cosθ₁ ⋅cosθ₂ is sensitive to the spin correlation between the t and t quarks. The distribution is unfolded to parton level and compared to the next-to-leading order prediction. A good agreement is observed.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Haug, Sigve, Weber, Michele, Beck, Hans Peter |
Subjects: |
500 Science > 530 Physics 500 Science > 510 Mathematics |
ISSN: |
1550-7998 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
Annette Krebs-Wegenast |
Date Deposited: |
15 Aug 2017 08:24 |
Last Modified: |
05 Dec 2022 15:05 |
Publisher DOI: |
10.1103/PhysRevD.93.012002 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt. |
BORIS DOI: |
10.7892/boris.100006 |
URI: |
https://boris.unibe.ch/id/eprint/100006 |
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