# The extra scalar degrees of freedom from the two Higgs doublet model for dark energy

## TL;DR

This paper explores how the two Higgs doublet model from particle physics can provide a scalar field explanation for dark energy, resembling a cosmological constant after diagonalization.

## Contribution

It proposes that the lightest Higgs bosons in the two Higgs doublet model can serve as dark energy candidates, extending the standard model.

## Key findings

- Dark energy from Higgs fields is indistinguishable from a cosmological constant.
- The model links particle physics with cosmological dark energy.
- Diagonalization yields a candidate scalar field for dark energy.

## Abstract

In principle a minimal extension of the standard model of Particle Physics, the two Higgs doublet model, can be invoked to explain the scalar field responsible of dark energy. The two doublets are in general mixed. After diagonalization, the lightest CP-even Higgs and CP-odd Higgs are jointly taken to be the dark energy candidate. The dark energy obtained from Higgs fields in this case is indistinguishable from the cosmological constant.