Rights statement: © 2011 American Physical Society
Final published version, 458 KB, PDF document
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Article number | 112005 |
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<mark>Journal publication date</mark> | 12/12/2011 |
<mark>Journal</mark> | Physical Review D |
Issue number | 11 |
Volume | 84 |
Number of pages | 13 |
Pages (from-to) | - |
Publication Status | Published |
<mark>Original language</mark> | English |
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 data set corresponding to an integrated luminosity of 5.4 fb(-1), collected by the D0 experiment at the Fermilab Tevatron Collider, we measure the t (t) over bar forward-backward asymmetry to be (9.2 +/- 3.7)% at the reconstruction level. When corrected for detector acceptance and resolution, the asymmetry is found to be (19.6 +/- 6.5)%. We also measure a corrected asymmetry based on the lepton from a top quark decay, found to be (15.2 +/- 4.0)%. The results are compared to predictions based on the next-to-leading-order QCD generator MC@NLO. The sensitivity of the measured and predicted asymmetries to the modeling of gluon radiation is discussed.