Cosmology of complex scalar dark matter: interplay of self-scattering and annihilation

Abstract

The cosmology of a standard model (SM) gauge singlet complex scalar dark matter (DM), stabilized by a reflection symmetry, is studied including all renormalizable interactions that preserve the reflection symmetry but can break the larger global U(1) symmetry of DM number. We find an interesting interplay of the ensuing DM self-scatterings and annihilations in generating the present DM density, and possible particle-antiparticle asymmetry in the DM sector. The role of DM self-scatterings in determining its present density and composition is a novel phenomenon. The simultaneous presence of the self-scatterings and annihilations is required to obtain a non-zero asymmetry, which otherwise vanishes due to unitarity sum rules.

arXiv comment21 pages, 8 figures; v2: 27 pages, 10 figures, new computations, figures and discussion added, version to appear in Physical Review D

References in corpus (18)

• Gauge Singlet Scalars as Cold Dark Matter
• The Minimal Model of Nonbaryonic Dark Matter: A Singlet Scalar
• Update on scalar singlet dark matter
• Complex Singlet Extension of the Standard Model
• Higgs-field Portal into Hidden Sectors
• Search for invisible decays of a Higgs boson produced through vector boson fusion in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Status of the scalar singlet dark matter model
• Dark matter constraints from box-shaped gamma-ray features
• Standard Model with a Complex Scalar Singlet: Cosmological Implications and Theoretical Considerations
• Symmetry and Emergence
• Oscillating Asymmetric Dark Matter
• Consequences of DM/antiDM Oscillations for Asymmetric WIMP Dark Matter
• Impact of vacuum stability, perturbativity and XENON1T on global fits of ${\mathbb{Z}}_2$ and ${\mathbb{Z}}_3$ scalar singlet dark matter
• Regenerating a Symmetry in Asymmetric Dark Matter
• Particle-antiparticle asymmetries from annihilations
• On the sensitivity of CTA to gamma-ray boxes from multi-TeV dark matter
• Asymmetric Dark Matter and CP Violating Scatterings in a UV Complete Model
• Revisiting the role of CP-conserving processes in cosmological particle-antiparticle asymmetries

Cited by in corpus (6)

• Asymmetric self-interacting dark matter with a canonical seesaw model
• Impact of dark matter self-scattering on its relic abundance
• Phenomenology of the dark matter sector in the 2HDM extended with complex scalar singlet
• Cogenesis of visible and dark matter in type-I Dirac seesaw
• Asymmetric dark matter from semi-annihilation: unitarity constraints and long-lived final states
• Dirac leptogenesis via scatterings