Measurement of the charge asymmetry in highly boosted top-quark pair production in √s = 8 TeV pp collision data collected by the ATLAS experiment

doi:10.1016/j.physletb.2016.02.055

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Measurement of the charge asymmetry in highly boosted top-quark pair production in √ s = 8TeV pp collision data collected by the ATLAS experiment	1 MB	Adobe Acrobat PDF	View Details	Download
DOI Доступ к ресурсу на сайте издателя				10.1016/j.physletb.2016.02.055

Title: Measurement of the charge asymmetry in highly boosted top-quark pair production in √s = 8 TeV pp collision data collected by the ATLAS experiment
Creator: Aad, G.
Creator: Abdallah, J.
Creator: Chelkov, G. A.
Creator: Abbott, B.
Subject: ATLAS, детектор
верхние кварки
Большой адронный коллайдер
Date: 2016
DOI: 10.1016/j.physletb.2016.02.055
Description: In the View the MathML sourcepp→tt¯ process the angular distributions of top and anti-top quarks are expected to present a subtle difference, which could be enhanced by processes not included in the Standard Model. This Letter presents a measurement of the charge asymmetry in events where the top-quark pair is produced with a large invariant mass. The analysis is performed on 20.3 fb−1 of pp collision data at View the MathML sources=8TeV collected by the ATLAS experiment at the LHC, using reconstruction techniques specifically designed for the decay topology of highly boosted top quarks. The charge asymmetry in a fiducial region with large invariant mass of the top-quark pair (View the MathML sourcemtt¯>0.75 TeV) and an absolute rapidity difference of the top and anti-top quark candidates within View the MathML source−2<|yt|−|yt¯|<2 is measured to be 4.2±3.2%4.2±3.2%, in agreement with the Standard Model prediction at next-to-leading order. A differential measurement in three View the MathML sourcett¯ mass bins is also presented.

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collection(s): Радиофизический факультет
Identifier: vtls:000579989
http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000579989
Type: статьи в журналах
Source: Physics Letters B. 2016. Vol. 756. P. 52-71
Language: eng

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Радиофизический факультет Measurement of the charge asymmetry in highly boosted top-quark pair production in √s = 8 TeV pp collision data collected by the ATLAS experiment