Measurement of the correlation between the polar angles of leptons from top quark decays in the helicity basis at √s = 7 TeV using the ATLAS detector

doi:10.1103/PhysRevD.93.012002

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Vaniachine, A. | 2016 | верхние кварки | Abdallah, J. | лептоны

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DOI Доступ к ресурсу на сайте издателя				10.1103/PhysRevD.93.012002

Title: Measurement of the correlation between the polar angles of leptons from top quark decays in the helicity basis at √s = 7 TeV using the ATLAS detector
Creator: Aad, G.
Creator: Abdallah, J.
Creator: Chelkov, G. A.
Creator: Vaniachine, A.
Creator: Abbott, B.
Subject: ATLAS, детектор
Большой адронный коллайдер
протон-протонные столкновения
лептоны
верхние кварки
Date: 2016
DOI: 10.1103/PhysRevD.93.012002
Description: 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 4.6 fb−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 t¯t 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.

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collection(s): Научное управление
Радиофизический факультет
Identifier: vtls:000622051
http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000622051
Type: статьи в журналах
Source: Physical Review D. 2016. Vol. 93, № 1. P. 012002-1-012002-23
Language: eng

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Научное управление Measurement of the correlation between the polar angles of leptons from top quark decays in the helicity basis at √s = 7 TeV using the ATLAS detector