First measurement of the forward-backward charge asymmetry in top quark pair production

Details First measurement of the forward-backward charge asymmetry in top quark pair production First measurement of the forward-backward charge asymmetry in top quark pair production

2007-12-05

arxiv.org/abs/0712.0851v1

Phys.Rev.Lett.100:142002,2008

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 4 figures (5 .eps files), submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.100.142002

We present the first measurement of the integrated forward-backward charge asymmetry in top-antitop quark pair (ttbar) production in proton-antiproton collisions in the lepton plus jets final state. Using a b-jet tagging algorithm and kinematic reconstruction assuming ttbar+X production and decay, a sample of 0.9fb-1 of data, collected by the D0 experiment at the Fermilab Tevatron Collider, is used to measure the asymmetry for different jet multiplicities. The result is also used to set upper limits on ttbar+X production via a Z' resonance.

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