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Measurement of the forward-backward asymmetry in top quark-antiquark production in ppbar collisions using the lepton+jets channel

Abstract : We present a measurement of the forward--backward asymmetry in top quark-antiquark production using the full Tevatron Run II dataset collected by the D0 experiment at Fermilab. The measurement is performed in lepton+jets final states using a new kinematic fitting algorithm for events with four or more jets and a new partial reconstruction algorithm for events with only three jets. Corrected for detector acceptance and resolution effects, the asymmetry is evaluated to be 10.6+-3.0 %. Results are consistent with the standard model predictions which range from 5.0% to 8.8%. We also present the dependence of the asymmetry on the invariant mass of the top quark--antiquark system and the difference in rapidities of top quark and antiquark.
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http://hal.in2p3.fr/in2p3-00987045
Contributor : Emmanuelle Vernay <>
Submitted on : Monday, May 5, 2014 - 1:02:52 PM
Last modification on : Friday, June 18, 2021 - 3:40:29 AM

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V.M. Abazov, G. Sajot, J. Stark, S. Greder, F. Miconi, et al.. Measurement of the forward-backward asymmetry in top quark-antiquark production in ppbar collisions using the lepton+jets channel. Physical Review D, American Physical Society, 2014, 90, pp.072011. ⟨10.1103/PhysRevD.90.072011⟩. ⟨in2p3-00987045⟩

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