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

Research output: Contribution to journalJournal article


Article number142002
Journal publication date9/04/2008
JournalPhysical Review Letters
Number of pages7
Original languageEnglish


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.

Bibliographic note

© 2008 The American Physical Society 8 pages, 4 figures (5 .eps files), submitted to Phys. Rev. Lett