Top quark asymmetry and Wjj excess at CDF from gauged flavor symmetry

TL;DR

This paper proposes a model with scalar doublets from gauged flavor symmetry that can simultaneously explain the CDF anomalies in top quark asymmetry and Wjj excess, predicting new scalars in the 100-400 GeV range.

Contribution

It introduces a scalar sector from gauged flavor symmetry that accounts for two recent CDF anomalies and predicts additional scalars within accessible energy ranges.

Findings

Scalar doublets explain CDF anomalies.

Predicted scalars in 100-400 GeV range.

Model consistent with flavor-changing constraints.

Abstract

We show that the scalar sector needed for fermion mass generation when the flavor symmetry of the standard model is maximally gauged can consistently explain two anomalies reported recently by the CDF collaboration - the forward-backward asymmetry in t-tbar pair production, and the dijet invariant mass in the Wjj channel. A pair of nearly degenerate scalar doublets with masses in the range 150-200 GeV explain these anomalies, with additional scalars predicted in the mass range 100-400 GeV. Consistency of such low scale flavor physics with flavor changing processes is shown, and expectations for the LHC are outlined.