Asymmetric Left-Right Model and the Top Pair Forward-Backward Asymmetry
Abstract
The forward-backward asymmetry measurement in top-pair production at the Tevatron is about 2σ from the Standard Model prediction. We propose an asymmetric left-right model, which includes a W' boson with a right-handed coupling of down to top quark, and a Z' boson with diagonal couplings to the up, top, and down quarks with MW'≈175 GeV and MZ'≈ 900 GeV. The model accounts for the asymmetry while remaining consistent with the top-pair total cross-section and invariant mass distribution.
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