Production regimes for Self-Interacting Dark Matter

By N. Bernal, Xiaoyong Chu, C. García-Cely, T. Hambye, Bryan Zaldívar. 2015

169 citations recorded by the source corpus.

In the context of Self-Interacting Dark Matter as a solution for the small-scale structure problems, we consider the possibility that Dark Matter could have been produced without being in thermal equilibrium with the Standard Model bath. We discuss one by one the following various dark matter production regimes of this kind: freeze-in, reannihilation and dark freeze-out. We exemplify how these mechanisms work in the context of the particularly simple Hidden Vector Dark Matter model. In contrast to scenarios where there is thermal equilibrium with the Standard Model bath, we find two regimes which can easily satisfy all the laboratory and cosmological constraints. These are dark freeze-out with 3-to-2 annihilations and freeze-in via a light mediator. In the first regime, different temperatures in the visible and the Dark Matter sectors allow us to avoid the constraints coming from cosmic structure formation as well as the use of non-perturbative couplings to reproduce the observed relic density. For the second regime, different couplings are responsible for Dark Matter relic density and self-interactions, permitting to surpass BBN, X-ray, CMB and direct detection constraints.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/344c4534386be737a4319c5c6e876a110c6ff006

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. G. Arcadi
2. P. Panci
3. S. Profumo
4. M. Taoso
5. Y. Mambrini
6. Marco Cirelli
7. Manfred Lindner
8. K. Tuominen

In Nuclear and High Energy Physics

1. G. Arcadi
2. S. Profumo
3. P. Panci
4. F. Queiroz
5. M. Taoso
6. Y. Mambrini
7. Marco Cirelli
8. Manfred Lindner

Citations in the corpus

• The Dawn of FIMP Dark Matter: A Review of Models and Constraints (2017, background): “[260] and has then been studied in various contexts including supersymmetry [261], Higgs portal [240, 241], kinetic mixing portal [240], and hidden vector DM models [241].”
• Dark Matter's secret liaisons: phenomenology of a dark U(1) sector with bound states (2016, background): “no significant cosmological abundance of dark photons was produced, while DM was populated due to pair-production processes by the SM fermions via the kinetic mixing of the dark photon to hypercharge (freeze-in) [124, 166].”
• The waning of the WIMP? A review of models, searches, and constraints (2017, background): “In the case of fermion DM the region surviving current 16 Dark matter a gauge boson of dark sector connected to the SM through the Higgs sector has been also proposed, for different DM production mechanisms, in [246, 247].”