Dark matter relic abundance beyond kinetic equilibrium

  title={Dark matter relic abundance beyond kinetic equilibrium},
  author={Tobias Binder and Torsten Bringmann and Michael Gustafsson and Andrzej Hryczuk},
  journal={The European Physical Journal C},
We introduce , a numerical precision tool for predicting the dark matter relic abundance also in situations where the standard assumption of kinetic equilibrium during the freeze-out process may not be satisfied. comes with a set of three dedicated Boltzmann equation solvers that implement, respectively, the traditionally adopted equation for the dark matter number density, fluid-like equations that couple the evolution of number density and velocity dispersion, and a full numerical evolution… 

DRAKE: Dark matter Relic Abundance beyond Kinetic Equilibrium

  • A. Hryczuk
  • Physics
    Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)
  • 2022
In the usual approach to the dark matter thermal relic abundance calculation an assumption of local thermal equilibrium is made. This proceedings presents a numerical precision tool DRAKE

A Global Analysis of Resonance-enhanced Light Scalar Dark Matter

We study a minimal model for a light scalar dark matter, requiring a light scalar mediator to address the core-cusp problem and interact with the standard model particles. We analyze the model

Toward a full description of MeV dark matter decoupling: A self-consistent determination of relic abundance and Neff

Thermal dark matter at the MeV mass-scale has its abundance set during the highly non-trivial epochs of neutrino decoupling and electron annihilation. The technical obstacles attached to solving

Impact of dark matter self-scattering on its relic abundance

Elastic self-scatterings do not change the number of dark matter particles and as such have been neglected in the calculation of its relic abundance. In this work we highlight the scenarios where the

DarkSUSY 6.3 – Freeze-in, out-of-equilibrium freeze-out, cosmic-ray upscattering and further new features

  • T. BringmannJ. Edsjo
  • Physics
    Proceedings of Computational Tools for High Energy Physics and Cosmology — PoS(CompTools2021)
  • 2022
DarkSUSY is a versatile tool for precision calculations of a large variety of dark matter-related signals, ranging from predictions for the dark matter relic density to dark matter self-interactions

Erratum: Dark Matter from Exponential Growth [Phys. Rev. Lett. 127, 191802 (2021)].

This corrects the article DOI: 10.1103/PhysRevLett.127.191802.

Analyzing the Hubble tension through hidden sector dynamics in the early universe

The recent analysis from the SH0ES collaboration has confirmed the existence of a Hubble tension between measurements at high redshift (z > 1000) and at low redshift (z < 1) at the 5σ level with the

Revisiting dark matter freeze-in and freeze-out through phase-space distribution

We revisit dark-matter production through freeze-in and freeze-out by solving the Boltzmann equations at the level of the phase-space distribution f(p,t). Using the 2 ⟶ 2 annihilation and the 1 ⟶ 2

MiMeS: Misalignment mechanism solver

Consistent explanation for the cosmic-ray positron excess in p-wave Breit–Wigner enhanced dark matter annihilation

Dark matter (DM) annihilation in the galactic halo can be enhanced relative to that in the early Universe due to the Breit–Wigner enhancement, if the DM particles annihilate through a narrow



When freeze-out occurs due to a non-Boltzmann suppression: a study of degenerate dark sector

Exponential suppression or commonly known as the Boltzmann suppression in the number density of dark matter is the key ingredient for creating chemical imbalance prior to the usual thermal

New Pathways to the Relic Abundance of Vector-Portal Dark Matter.

We fully explore the thermal freezeout histories of a vector-portal dark matter model, in the region of parameter space in which the ratio of masses of the dark photon $A^{\prime}$ and dark matter

Precise WIMP dark matter abundance and Standard Model thermodynamics

A weakly interacting massive particle (WIMP) is a leading candidate of the dark matter. The WIMP dark matter abundance is determined by the freeze-out mechanism. Once we know the property of the WIMP

Effect of the early kinetic decoupling in a fermionic dark matter model

  • T. Abe
  • Physics
    Physical Review D
  • 2020
We study the effect of the early kinetic decoupling in a model of fermionic dark matter (DM) that interacts with the standard model particles only by exchanging the Higgs boson. There are two

Coscattering in next-to-minimal dark matter and split supersymmetry

In some models of thermal relic dark matter, the relic abundance may be set by inelastic scattering processes (rather than annihilations) becoming inefficient as the universe cools down. This effect

Precision calculations of dark matter relic abundance

The dark matter annihilation channels sometimes involve sharp resonances. In such cases the usual momentum averaged approximations for computing the DM abundance may not be accurate. We develop an

Global analysis of dark matter simplified models with leptophobic spin-one mediators using MasterCode

We report the results of a global analysis of dark matter simplified models (DMSMs) with leptophobic mediator particles of spin one, considering the cases of both vector and axial-vector

Kinetic theory in the expanding universe

Preface 1. Tools: relativity 2. Tools: cosmodynamics 3. Tools: kinetic theory 4. The canonical example 5. The generalized Lee-Weinberg problem: background 6. The generalized Lee-Weinberg problem: