# Primordial Black Holes and a Common Origin of Baryons and Dark Matter

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## Abstract

**:**

## 1. Introduction

## 2. The Quark-Hadron Transition

## 3. Electroweak Baryogenesis at the QCD Epoch

## 4. The Origin of the Large Curvature Fluctuations

## 5. The PBH Mass Distribution

## 6. Addressing the Fine-Tunings

## 7. Conclusions

## Author Contributions

## Funding

## Institutional Review Board Statement

## Informed Consent Statement

## Data Availability Statement

## Acknowledgments

## Conflicts of Interest

## References

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**Figure 1.**Qualitative representation of the three steps in our scenario. (

**A**) Gravitational collapse to a PBH of the curvature fluctuation at horizon re-entry. (

**B**) Sphaleron transition in hot spot around the PBH, producing $\eta \gtrsim \mathcal{O}\left(1\right)$ locally through EW baryogenesis. (

**C**) Propagation of baryons to rest of Universe through jets, resulting in the observed BAU with $\eta $∼${10}^{-9}$.

**Figure 2.**PBH mass functions, ${f}_{\mathrm{PBH}}\equiv (\mathrm{d}{\rho}_{\mathrm{PBH}}/\mathrm{d}\phantom{\rule{0.166667em}{0ex}}lnM)/{\rho}_{\mathrm{DM}}$, for different curvaton models and for a collapse efficiency $\gamma =0.2$ (dotted) and $\gamma =0.8$ (solid), the integrated PBH abundance corresponding to the dark matter density in all cases. The vertical (grey) lines correspond to the temperature at PBH formation (assuming $\gamma =0.2$). It is comparable to the mass function for a nearly flat spectrum of Gaussian curvature fluctuations with spectral index ${n}_{\mathrm{s}}=0.97$ (dashed blue line). The double arrow indicates the peak in the number of dark lenses from combined OGLE and Gaia microlensing observations [28].

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García-Bellido, J.; Carr, B.; Clesse, S. Primordial Black Holes and a Common Origin of Baryons and Dark Matter. *Universe* **2022**, *8*, 12.
https://doi.org/10.3390/universe8010012

**AMA Style**

García-Bellido J, Carr B, Clesse S. Primordial Black Holes and a Common Origin of Baryons and Dark Matter. *Universe*. 2022; 8(1):12.
https://doi.org/10.3390/universe8010012

**Chicago/Turabian Style**

García-Bellido, Juan, Bernard Carr, and Sébastien Clesse. 2022. "Primordial Black Holes and a Common Origin of Baryons and Dark Matter" *Universe* 8, no. 1: 12.
https://doi.org/10.3390/universe8010012