Constraints on the dark sector from electroweak precision observables

TL;DR

This paper analyzes how electroweak precision measurements, including recent W boson mass data, constrain models with dark photons and their interactions with dark matter.

Contribution

It provides the first constraints on dark photon couplings to dark matter using electroweak precision observables, considering recent W mass measurements.

Findings

Constraints on dark photon parameter space derived from electroweak data.

Updated electroweak fit incorporating the latest W boson mass measurements.

New limits on dark photon interactions with fermionic dark matter.

Abstract

We revisit the Standard Model fit to electroweak precision observables in using the latest data and the Particle Data Group (PDG) measurement of the W boson mass. The analysis is then repeated in light of the new W boson mass measurement from the Collider Detector at Fermilab (CDF) collaboration. We then introduce a dark photon to the model, placing constraints on the parameter space arising from these electroweak precision observables, both for the PDG and CDF values for the W boson mass. We also extend previous work by placing the first electroweak precision observable constraints on the coupling of dark photons to the fermionic dark matter sector.