Tevatron asymmetry of tops in a W′, Z′ model

Recent results from the CDF Collaboration indicate that the top-pair forward-backward asymmetry is largest in regions of high rapidity difference vertical bar Delta y vertical bar and invariant mass M-t (t) over bar. We show that experimental observations can be explained by our previously proposed Asymmetric Left-Right Model (ALRM). The gauge symmetry U'(1) x SU'(2) x SU(2) is broken by a triplet Higgs in the primed sector. The W' boson has a (t,d) right-handed coupling and the Z' boson has diagonal fermion couplings. We determine the model parameters to be M-W' = 700 GeV, M-Z' = 1 TeV, and charged current coupling g(2)' = 3. The W' and Z' total decay widths are of O(100 GeV). The signals from Z' -> t (t) over bar and W' -> tb at the LHC will test the model. (C) 2011 Elsevier B.V. All rights reserved.