Dark Forces At The Tevatron

TL;DR

This paper proposes a new leptophobic gauge boson to explain the CDF W+dijet excess, which also predicts a dark matter candidate with detectable scattering cross sections, linking collider anomalies to dark matter signals.

Contribution

It introduces a leptophobic Z' gauge boson model that accounts for collider excesses and predicts a viable dark matter candidate with specific scattering properties.

Findings

Predicts a Z' boson with couplings explaining the CDF excess.

Suggests the dark matter candidate has a scattering cross section ~10^-40 cm^2.

Links collider anomalies to dark matter detection signals.

Abstract

A simple explanation of the W+dijet excess recently reported by the CDF collaboration involves the introduction of a new gauge boson with sizable couplings to quarks, but with no or highly suppressed couplings to leptons. Anomaly-free theories which include such a leptophobic gauge boson must also include additional particle content, which may include a stable and otherwise viable candidate for dark matter. Based on the couplings and mass of the Z' required to generate the CDF excess, we predict such a dark matter candidate to possess an elastic scattering cross section with nucleons on the order of sigma ~ 10^-40 cm^2, providing a natural explanation for the signals reported by the CoGeNT and DAMA/LIBRA collaborations. In this light, CDF may be observing the gauge boson responsible for the force which mediates the interactions between the dark and visible matter of our universe.