# Forward-backward asymmetry in top quark-antiquark production

Abstract : We present a measurement of forward-backward asymmetry in top quark-antiquark production in proton-antiproton collisions in the final state containing a lepton and at least four jets. Using a dataset corresponding to an integrated luminosity of $5.4\,\mathrm {fb}^{-1}$, collected by the \DZ\ experiment at the Fermilab Tevatron Collider, we measure the \ttbar\ forward-backward asymmetry to be $(9.2 \pm 3.7)$% at the reconstruction level. When corrected for detector acceptance and resolution, the asymmetry is found to be $(19.6 \pm 6.5)$%. We also measure a corrected asymmetry based on the lepton from a top quark decay, found to be $(15.2 \pm 4.0)$%. The results are compared to predictions based on the next-to-leading-order QCD generator {\sc mc@nlo}. The sensitivity of the measured and predicted asymmetries to the modeling of gluon radiation is discussed.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00611263
Contributor : Emmanuelle Vernay <>
Submitted on : Tuesday, July 26, 2011 - 8:44:54 AM
Last modification on : Sunday, June 20, 2021 - 3:34:50 AM

### Citation

V.M. Abazov, B. Abbott, B.S. Acharya, M. Adams, T. Adams, et al.. Forward-backward asymmetry in top quark-antiquark production. Physical Review D, American Physical Society, 2011, 84, pp.112005. ⟨10.1103/PhysRevD.84.112005⟩. ⟨in2p3-00611263⟩

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