W plus two jets from a quasi-inert Higgs doublet

TL;DR

This paper proposes a simple extension of the Standard Model with an additional quasi-inert Higgs doublet to explain the CDF W plus two jets excess, consistent with existing constraints and predicting new signals at colliders.

Contribution

The paper introduces a quasi-inert Higgs doublet model that accounts for the CDF anomaly and remains compatible with electroweak and flavor physics constraints.

Findings

Model explains the CDF W+2 jets excess.

Neutral Higgs states have about 150 GeV mass.

Model is consistent with electroweak and flavor constraints.

Abstract

We show that, the result recently reported by the CDF collaboration showing an excess in the invariant mass distribution of jet pairs produced in association with a W-boson can be explained by a simple extension of the Standard Model (SM) with an additional quasi-inert Higgs doublet. The two additional neutral Higgs states H^0 and A^0 have a mass of about 150 GeV and decay into a pair of jets. W^\pm H^0/A^0 pairs are produced from the decay of the heavier charged Higgs boson H^\pm. Depending on the precise masses of the neutral and charged Higgs bosons, the model is shown to be in agreement with constraints from electroweak precision tests and from flavor physics for a broad range of the Standard Model-like Higgs mass from 100 GeV to several hundreds of GeV. Other possible signals of this model at the Tevatron and the LHC are discussed.