Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at √s=8 TeV with the ATLAS detector

Mullier, Geoffrey; Haug, Sigve; Weber, Michael; Meloni, Federico; Cervelli, Alberto; Beck, Hans Peter; Stucci, Stefania; Ereditato, Antonio (2016). Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at √s=8 TeV with the ATLAS detector. Physical review. D - particles, fields, gravitation, and cosmology, D94(3), 032006. American Physical Society 10.1103/PhysRevD.94.032006

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Measurements of the top--antitop quark pair production charge asymmetry in the dilepton channel, characterized by two high-pT leptons (electrons or muons), are presented using data corresponding to an integrated luminosity of 20.3 fb⁻¹ from pp collisions at a center-of-mass energy of √s=8 TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. Inclusive and differential measurements as a function of the invariant mass, transverse momentum, and longitudinal boost of the tt system are performed both in the full phase space and in a fiducial phase space closely matching the detector acceptance. Two observables are studied: AℓℓC based on the selected leptons and AttC based on the reconstructed tt final state. The inclusive asymmetries are measured in the full phase space to be AℓℓC =0.008±0.006 and AttC =0.021±0.016 , which are in agreement with the Standard Model predictions of AℓℓC =0.0064±0.0003 and AttC =0.0111±0.0004 .

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Haug, Sigve; Weber, Michael and 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:

07 Aug 2017 16:00

Last Modified:

07 Aug 2017 16:00

Publisher DOI:

10.1103/PhysRevD.94.032006

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt.

BORIS DOI:

10.7892/boris.99959

URI:

https://boris.unibe.ch/id/eprint/99959

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