A Higgsophilic s-channel Z' and the CDF W+2J Anomaly

TL;DR

This paper proposes a Higgsophilic Z' boson model to explain the CDF W+2j anomaly, fitting the excess with a new particle near 270 GeV decaying into a W and a charged Higgs, consistent with electroweak data.

Contribution

It introduces a specific Higgsophilic Z' model that accounts for the CDF anomaly without conflicting with electroweak constraints, offering distinctive Tevatron signatures.

Findings

The Z' boson near 270 GeV explains the dijet excess.

The model evades electroweak constraints without fine-tuning.

Distinctive signatures at the Tevatron are predicted.

Abstract

The CDF collaboration recently presented evidence for an excess in the dijet invariant mass distribution coming from events in a W+2j exclusive sample. Here we show that this excess can be explained by the s-channel production of a weakly coupled Higgsophilic Z' near M_Z' ~ 270 GeV which decays into a W^\pm and a charged Higgs at M_{H^\pm} ~ 150 GeV. While the simplest implementations of a general leptophobic Z' model quickly run into tensions with electroweak observables, a more specific Higgsophilic model evades these constraints without resorting to any fine-tuning. We discuss the distinctive features of this model, focusing on its particular signatures at the Tevatron.