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arXiv · 1102.0279

Tevatron Asymmetry of Tops in a W',Z' Model

Vernon Barger·Wai-Yee Keung·Chiu-Tien Yu
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Abstract

Recent results from the CDF Collaboration indicate the the top-pair forward-backward asymmetry is largest in regions of high rapidity difference $|\Delta y|$ and invariant mass $M_{t\bar t}.$ We show that experimental observations can be explained by our previously proposed Asymmetric Left-Right Model (ALRM). The gauge symmetry $U'(1)\times SU'(2)\times SU(2)$ 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 $\mathcal{O}(100$ GeV). The signals from $Z'\to t\bar t$ and $W'\to tb$ at the LHC will test the model.

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Vernon Barger, Wai-Yee Keung, Chiu-Tien Yu. 2011-02-01. Tevatron Asymmetry of Tops in a W',Z' Model. https://doi.org/10.1016/j.physletb.2011.03.010

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