Observing the Dark Scalar Doublet and its Impact on the Standard-Model Higgs Boson at Colliders

TL;DR

This paper explores the phenomenology of a hypothetical dark scalar doublet extending the Standard Model, analyzing its potential effects on Higgs boson behavior and implications for dark matter detection at colliders.

Contribution

It provides a comprehensive analysis of the dark scalar doublet's properties and its influence on Higgs phenomenology without assuming it as the primary dark matter source.

Findings

The dark scalar doublet introduces new particles affecting collider signals.

Potential modifications to Higgs boson decay channels.

Implications for dark matter detection strategies.

Abstract

If the Standard Model of particle interactions is extended to include a second scalar doublet $[H^{+},(H^{0}+iA^{0})/\sqrt{2}]$, which is odd under an unbroken Z_{2} discrete symmetry, it may be called the $dark$ scalar doublet, because its lightest neutral member, say H^{0}, is one posssible component for the dark matter of the Universe. We discuss the general phenomenology of the four particles of this doublet, without assuming that H^{0} is the dominant source of dark matter. We also consider the impact of this $dark$ scalar doublet on the phenomenology of the SM Higgs boson h.