New Horizons in Primordial Black Hole physics (NEHOP)

Session

Session 6

20 Jun 2023, 11:20

Naples, Italy

Conveners

Session 6

• Chair: Bradley Kavanagh

47. Dark matter and dark radiation from evaporating primordial black holes

Isabella Masina (University of Ferrara, Italy)

20/06/2023, 11:20

Talk

Primordial black holes might have existed in the early universe and, via their evaporation mechanism (completed before Big Bang Nucleosynthesis), they might have released stable particles beyond the Standard Model. We review the possibility that such particles might contribute to dark matter or dark radiation.

40. Dark Matter in the Time of Primordial Black Holes

Nicolás Bernal (NYU Abu Dhabi)

20/06/2023, 11:40

Talk

The evaporation of primordial black holes (PBH) with masses ranging from $\sim {10}^{-1}$ to ${10}^9$ g could have generated the whole observed dark matter (DM) relic density. It is typically assumed that after being produced, its abundance freezes and remains constant. However, thermalization and number-changing processes in the dark sector can have a strong impact, in particular enhancing the DM...

16. Dark Matter production from evaporating black holes

Dr Andrew Cheek (Astrocent, NCAC)

20/06/2023, 12:00

Talk

Hawking evaporation of black holes is expected to copiously produce all kinds of particles, regardless of their charges. In this talk, I will discuss how Hawking evaporation provides an efficient way of creating dark matter by way of gravity only. I will then explore the interplay between Primordial Black Hole production and interacting dark matter and their potential incompatibilities....

12. Leptogenesis looking into the abyss: The effects of Primordial Black Hole evaporation

Yuber Perez

20/06/2023, 12:20

Talk

Black Hole evaporation offers a unique particle production method unlike any other interaction process. In the Early Universe, such evaporation can affect the baryon asymmetry produced via leptogenesis since heavy right-handed neutrinos can be emitted independently of the properties of the primordial plasma. However, there is also a large amount of entropy injected, which could dilute the...