A Z' Model for the CDF Dijet Anomaly

TL;DR

This paper proposes a Z' boson model with a 145 GeV mass coupling only to first-generation quarks to explain the CDF dijet excess, remaining viable after resonance constraints.

Contribution

It introduces a specific Z' model that accounts for the CDF dijet anomaly while satisfying existing experimental constraints.

Findings

A Z' boson with 145 GeV mass can explain the CDF excess.

The model remains viable within certain parameter space after resonance constraints.

The approach is bottom-up, focusing on explaining experimental anomalies.

Abstract

We adopt a bottom-up approach to constructing a new physics model to explain the CDF excess seen in dijets with an associated lepton and missing transverse energy. We find that the 145 GeV broad feature seen by CDF in the dijet invariant mass distribution can be explained by a Z' boson with a mass of 145 GeV that couples only to first generation quarks. After dijet resonance constraints are considered, a sizeable region of the parameter space favored by the CDF anomaly remains viable.