Measurement of the charge asymmetry in dileptonic decays of top quark pairs in pp collisions at s √ =7 TeV using the ATLAS detector

ATLAS, Collaboration; Beck, Hans Peter; Cervelli, Alberto; Ereditato, Antonio; Haug, Sigve; Kabana, Sonja; Meloni, Federico; Pretzl, Klaus-Peter; Stramaglia, Maria Elena; Stucci, Stefania; Weber, Michael (2015). Measurement of the charge asymmetry in dileptonic decays of top quark pairs in pp collisions at s √ =7 TeV using the ATLAS detector. Journal of High Energy Physics, 2015(5), p. 61. Springer 10.1007/JHEP05(2015)061

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A measurement of the top-antitop (tt ¯ ) charge asymmetry is presented using data corresponding to an integrated luminosity of 4.6 fb ¯¹ of LHC pp collisions at a centre-of-mass energy of 7 TeV collected by the ATLAS detector. Events with two charged leptons, at least two jets and large missing transverse momentum are selected. Two observables are studied: A ℓℓ C based on the identified charged leptons, and A tt ¯ C , based on the reconstructed tt ¯ final state. The asymmetries are measured to be A ℓℓ C = 0.024±0.015 (stat.)±0.009 (syst.), A tt ¯ C = 0.021±0.025 (stat.)±0.017 (syst.). The measured values are in agreement with the Standard Model predictions.

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)

UniBE Contributor:

Beck, Hans Peter; Cervelli, Alberto; Ereditato, Antonio; Haug, Sigve; Meloni, Federico; Pretzl, Klaus-Peter; Stramaglia, Maria Elena; Stucci, Stefania and Weber, Michael

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Annette Krebs-Wegenast

Date Deposited:

06 Sep 2016 15:25

Last Modified:

11 Sep 2016 02:12

Publisher DOI:

10.1007/JHEP05(2015)061

ArXiv ID:

1501.07383

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt

BORIS DOI:

10.7892/boris.87660

URI:

https://boris.unibe.ch/id/eprint/87660

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