Two-component scalar dark matter in $Z_{2n}$ scenarios

Abstract

In multi-component scalar dark matter scenarios, a single $Z_N$ ($N\ge 4$) symmetry may account for the stability of different dark matter particles. Here we study the case where $N$ is even ($N=2n$) and two species, a complex scalar and a real scalar, contribute to the observed dark matter density. We perform a phenomenological analysis of three scenarios based on the $Z_4$ and $Z_6$ symmetries, characterizing their viable parameter spaces and analyzing their detection prospects. Our results show that, thanks to the new interactions allowed by the $Z_{2n}$ symmetry, current experimental constraints can be satisfied over a wider range of dark matter masses, and that these scenarios may lead to observable signals in direct detection experiments. Finally, we argue that these three scenarios serve as prototypes for other two-component $Z_{2n}$ models with one complex and one real dark matter particle.

21 pages, 11 figures; v2 matches version published in JHEP

References in corpus (14)

• Gauge Singlet Scalars as Cold Dark Matter
• micrOMEGAs4.1: two dark matter candidates
• Complex Singlet Extension of the Standard Model
• Multi-Component Dark Matter
• Z_3 Dark Matter and Two-Loop Neutrino Mass
• Dark Discrete Gauge Symmetries
• A Supersymmetric U(1)' Model with Multiple Dark Matters
• Minimal semi-annihilating ${\mathbb{Z}}_N$ scalar dark matter
• A minimal model for two-component dark matter
• Mitigating Direct Detection Bounds in Non-minimal Higgs Portal Scalar Dark Matter Models
• Nonthermal Two Component Dark Matter Model for Fermi-LAT $\gamma$-ray excess and 3.55 keV X-ray Line
• Lightest U-parity Particle (LUP) dark matter
• Improved bounds on ${\mathbb{Z}}_3$ singlet dark matter
• Search for Semi-Annihilating Dark Matter with Fermi-LAT, H.E.S.S., Planck, and the Cherenkov Telescope Array

Cited by in corpus (5)

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• The $Z_7$ model of three-component scalar dark matter
• Distinguishing two dark matter component particles at $e^{+}{e}^{-}$ colliders
• The centers of discrete groups as stabilizers of Dark Matter