Perturbative extension of the standard model with a 125 GeV Higgs and Magnetic Dark Matter

TL;DR

This paper presents a perturbative extension of the standard model incorporating a new dark matter sector with a 125 GeV Higgs, aiming to reconcile experimental tensions and provide testable collider and dark matter search predictions.

Contribution

It introduces a novel dark matter model with loop-induced interactions, constrained by collider data, and compatible with Higgs observations, offering a new framework for dark matter phenomenology.

Findings

Model accommodates observed Higgs properties.

Constraints from LHC data limit model parameters.

Predictions for collider signatures and dark matter searches.

Abstract

We introduce a perturbative extension of the standard model featuring a new dark matter sector together with a 125 GeV Higgs. The new sector consists of a vector-like heavy electron E, a complex scalar electron S and a standard model singlet Dirac fermion \chi. The interactions among the dark matter candidate \chi and the standard model particles occur via loop-induced processes involving the operator SE\chi y, with y being the Yukawa-like coupling. The model is an explicit underlying realization of the light magnetic dark matter effective model introduced earlier to alleviate the tension among several direct dark matter search experiments. We further constrain the parameters of the underlying theory using results from the Large Hadron Collider. The extension can accommodate the recently observed properties of the Higgs-like state and leads to interesting predictions. Finally we show that the model's collider phenomenology and constraints nicely complement the ones coming from dark matter searches.