Chiral U(1) flavor models and flavored Higgs doublets: the top FB asymmetry and the Wjj

TL;DR

This paper develops U(1) flavor models with flavored Higgs doublets to explain the top forward-backward asymmetry and Wjj resonance, addressing anomaly cancellation, Yukawa couplings, and dark matter.

Contribution

It introduces a novel U(1) flavor model with flavored Higgs doublets that explains collider anomalies and incorporates dark matter candidates.

Findings

Model explains top FB asymmetry and Wjj resonance.

Extra Higgs doublets help evade collider constraints.

Model includes potential dark matter candidates.

Abstract

We present U(1) flavor models for leptophobic Z' with flavor dependent couplings to the right-handed up-type quarks in the Standard Model, which can accommodate the recent data on the top forward-backward (FB) asymmetry and the dijet resonance associated with a W boson reported by CDF Collaboration. Such flavor-dependent leptophobic charge assignments generally require extra chiral fermions for anomaly cancellation. Also the chiral nature of U(1)' flavor symmetry calls for new U(1)'-charged Higgs doublets in order for the SM fermions to have realistic renormalizable Yukawa couplings. The stringent constraints from the top FB asymmetry at the Tevatron and the same sign top pair production at the LHC can be evaded due to contributions of the extra Higgs doublets. We also show that the extension could realize cold dark matter candidates.