• Corpus ID: 211076082

# Co-SIMP Miracle

@inproceedings{Smirnov2020CoSIMPM,
title={Co-SIMP Miracle},
author={Juri Smirnov and John F. Beacom},
year={2020}
}
• Published 10 February 2020
• Physics
We present a new mechanism for thermally produced dark matter, based on a semi-annihilationlike process, χ+χ+ SM→ χ+ SM, with intriguing consequences for the properties of dark matter. First, its mass is low, . 1 GeV (but & 5 keV to avoid structure-formation constraints). Second, it is strongly interacting, leading to kinetic equilibrium between the dark and visible sectors, avoiding the structure-formation problems of χ + χ + χ → χ + χ models. Third, in the 3 → 2 process, one dark matter…
10 Citations

## Figures from this paper

### Exploring new physics with O(keV) electron recoils in direct detection experiments

• Physics
• 2020
Motivated by the recent XENON1T results, we explore various new physics models that can be discovered through searches for electron recoils in O $$\mathcal{O}$$ (keV)-threshold direct-detection

### Exoplanets as New Sub-GeV Dark Matter Detectors

• Physics, Geology
• 2020
We present exoplanets as new targets to discover Dark Matter (DM), with advantages due to their large expected abundance, low temperatures, and large sizes. Throughout the Milky Way, DM can scatter,

### Exothermic dark matter for XENON1T excess

Motivated by the recent excess in the electron recoil from XENON1T experiment, we consider the possibility of exothermic dark matter, which is composed of two states with mass splitting. The heavier

### Electric But Not Eclectic: Thermal Relic Dark Matter for the XENON1T Excess.

• Physics
Physical review letters
• 2020
It is shown that a straightforward model of inelastic dark matter produced via early Universe thermal freeze-out annihilation can account for the XENON1T excess.

### U(1) mixing and the weak gravity conjecture

• Physics
• 2020
Tiny values for gauge couplings of dark photons allow to suppress their kinetic mixing with ordinary photons. We point out that the Weak Gravity Conjecture predicts consequently low ultraviolet

### Neutrino Self-Interactions and XENON1T Electron Recoil Excess.

• Physics
Physical review letters
• 2020
It is shown that such coupling values can naturally arise in a renormalizable model of long-range vector-mediated neutrino self-interactions, and could be distinguished from other explanations of the XENON1T excess by the characteristic 1/T^{2} energy dependence of the neutrinos-electron scattering cross section.

## References

SHOWING 1-10 OF 93 REFERENCES

### Enabling forbidden dark matter

• Physics
• 2017
The thermal relic density of dark matter is conventionally set by two-body annihilations. We point out that in many simple models, $3 \to 2$ annihilations can play an important role in determining

### GeV-scale thermal WIMPs: Not even slightly ruled out

• Physics
Physical Review D
• 2018
Weakly Interacting Massive Particles (WIMPs) have long reigned as one of the leading classes of dark matter candidates. The observed dark matter abundance can be naturally obtained by freezeout of

### Mechanism for thermal relic dark matter of strongly interacting massive particles.

• Physics
Physical review letters
• 2014
A new paradigm for achieving thermal relic dark matter is presented and 3→2 annihilations typically predict sizable 2→2 self-interactions which naturally address the "core versus cusp" and "too-big-to-fail" small-scale structure formation problems.

### Discovering true muonium at LHCb

• Physics
Physical Review D
• 2019
We study the potential of the LHCb experiment to discover, for the first time, the $\mu^+\mu^-$ true muonium bound state. We propose a search for the vector $1^3S_1$ state, $\mathcal{T\!M}$, which

### Results on MeV-scale dark matter from a gram-scale cryogenic calorimeter operated above ground

• Physics
• 2017
Models for light dark matter particles with masses below 1 GeV/c$$^2$$2 are a natural and well-motivated alternative to so-far unobserved weakly interacting massive particles. Gram-scale cryogenic

### Tev-scale thermal WIMPs: Unitarity and its consequences

• Physics
Physical Review D
• 2019
We re-examine unitarity bounds on the annihilation cross section of thermal-WIMP dark matter. For high-mass pointlike dark matter, it is generic to form WIMP bound states, which, together with

### Detecting superlight dark matter with Fermi-degenerate materials

• Physics
• 2015
A bstractWe examine in greater detail the recent proposal of using superconductors for detecting dark matter as light as the warm dark matter limit of O$$\mathcal{O}$$(keV). Detection of suc light

### Bounds on very low reheating scenarios after Planck

• Physics
• 2015
We consider the case of very low reheating scenarios [${T}_{\mathrm{RH}}\ensuremath{\sim}\mathcal{O}(\mathrm{MeV})$] with a better calculation of the production of the relic neutrino background (with

### Kamionkowski, “Unitarity Limits on the Mass and Radius of DM Particles

• Phys. Rev. Lett
• 1990

### Light Dark Matter Search with Ionization Signals in XENON1T.

• Physics
Physical review letters
• 2019
Constraints on light dark matter (DM) models using ionization signals in the XENON1T experiment are reported, and no DM or CEvNS detection may be claimed because the authors cannot model all of their backgrounds.