A Dark Sector Extension of the Almost-Commutative Standard Model

TL;DR

This paper extends the Standard Model within Noncommutative Geometry by introducing a dark sector with new fermions and scalars, successfully lowering the Higgs mass prediction and satisfying gauge coupling constraints.

Contribution

It presents a novel dark sector extension of the Almost-Commutative Standard Model that addresses previous limitations and adjusts the Higgs mass prediction.

Findings

Lowered Higgs mass prediction to 120-130 GeV

Resolved gauge coupling constraints issues

Introduced a dark sector with fermions and scalars

Abstract

We consider an extension of the Standard Model within the frame work of Noncommutative Geometry. The model is based on an older model [St09] which extends the Standard Model by new fermions, a new U(1)-gauge group and, crucially, a new scalar field which couples to the Higgs field. This new scalar field allows to lower the mass of the Higgs mass from ~170 GeV, as predicted by the Spectral Action for the Standard Model, to a value of 120-130 GeV. The short-coming of the previous model lay in its inability to meet all the constraints on the gauge couplings implied by the Spectral Action. These shortcomings are cured in the present model which also features a "dark sector" containing fermions and scalar particles.