Forward-backward asymmetry in t¯t production

Amidei, D. (2012) Forward-backward asymmetry in t¯t production. Il nuovo cimento C, 35 (1). pp. 327-332. ISSN 1826-9885

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We present new measurements of the forward-backward asymmetry in t¯t production, performed with 5 fb−1 of Tevatron p¯p collisions at center of mass energy 1.96 TeV, recorded and analyzed at CDF. Significant inclusive asymmetries are observed in both the lepton+jets and the dilepton decay modes of the t¯t pair. In the dilepton mode, the asymmetry is observed in the reconstructed top rapidity, and in the lepton rapidity difference which is independent of any top reconstruction. In the lepton plus jets sample, the full reconstruction of the top kinematics is used to measure the dependence of the asymmetry on the rapidity difference Δy and the invariant mass Mt¯t of the t¯t system, and the asymmetry is found to be most significant at large rapidity and mass.

Item Type: Article
Uncontrolled Keywords: Top quarks
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 14 Apr 2020 19:11
Last Modified: 14 Apr 2020 19:11

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