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Asymmetric Left-Right Model and the Top Pair Forward-Backward Asymmetry

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arxiv 1002.1048 v4 pith:XHUPRANJ submitted 2010-02-04 hep-ph hep-ex

Asymmetric Left-Right Model and the Top Pair Forward-Backward Asymmetry

classification hep-ph hep-ex
keywords modelasymmetryasymmetricbosondownforward-backwardleft-righttop-pair
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The forward-backward asymmetry measurement in top-pair production at the Tevatron is about $2\sigma$ 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 $M_{W'}\approx175$ GeV and $M_{Z'}\approx 900$ 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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