The effect of the curvature-scalar mixing on the annihilation cross sections of dark matter scalar and unparticle dark matter

TL;DR

This paper investigates how curvature-scalar mixing influences the annihilation cross sections of scalar and unparticle dark matter within the Randall Sundrum framework, revealing significant effects on dark matter annihilation rates.

Contribution

It introduces the analysis of curvature-scalar mixing effects on dark matter annihilation in Randall Sundrum models, including both scalar and unparticle dark matter candidates.

Findings

Curvature-scalar mixing significantly enhances annihilation cross sections.

Radion and Higgs scalars both contribute to dark matter annihilation.

Mixing effects are crucial for matching current dark matter annihilation observations.

Abstract

We consider the dark matter scalar in the Randall Sundrum background and study the annihilation cross section if the curvature-scalar mixing is switched on. In this case, in addition to the radion, the standard model Higgs scalar drives the annihilation and it leads to a considerable enhancement in the annihilation cross section. Furthermore we take unparticle, having a non-zero mass coming from the standard model Higgs-unparticle interaction in the low energy level, as a dark matter candidate and analyze the annihilation cross section by including the effect of the curvature-scalar mixing. We see that, for both choices, the mixing process plays an essential role in obtaining the dark matter annihilation cross section in the current range.