Dark Matter and Yukawa Unification with Massive Neutrinos

TL;DR

This paper examines how massive neutrinos influence dark matter constraints and Yukawa unification, expanding the viable parameter space for neutralino dark matter in supersymmetric models.

Contribution

It demonstrates that massive neutrinos modify bottom quark mass predictions, allowing Yukawa unification at large tanβ and positive μ, thus broadening dark matter parameter space.

Findings

Neutrino mixing affects bottom quark mass predictions.

Yukawa unification becomes viable at large tanβ and positive μ.

Expanded parameter space for neutralino dark matter, especially near resonance regions.

Abstract

We revisit the WMAP dark matter constraints on Yukawa Unification in the presence of massive neutrinos. The large neutrino mixing indicated by the data modifies the predictions for the bottom quark mass, and enables Yukawa also for large $\tan\beta$, and for positive $\mu$ that were previously disfavoured. As a result, the allowed parameter space for neutralino dark matter also increases, particularly for areas with resonant enhancement of the neutralino relic density.