New Horizons in Primordial Black Hole physics (NEHOP) -- '24

Session

Session 9

Jun 19, 2024, 9:00 AM

National Galleries of Scotland

Conveners

Session 9

• Chair: Sébastien Clesse

3. Constraining primordial non-Gaussianities with primordial black hole induced gravitational waves

Theodoros Papanikolaou (National Observatory of Athens)

6/19/24, 9:00 AM

Ultra-light PBHs with masses $M<5\times 10^8\mathrm{g}$ can dominate transiently the energy budget of the Universe and reheat the Universe through their evaporation taking place before Big Bang Nucleosynthesis (BBN). Interestingly enough, the inhomogeneous distribution of a population of such light PBHs can induce the abundant production of GWs due to second-order gravitational effects. In...

6. Dark Dresses around Primordial Black Holes: Phenomenological Implications

Daniele Gaggero (Istituto Nazionale di Fisica Nucleare, Sezione di Pisa)

6/19/24, 9:20 AM

I will discuss the interplay between the phenomenology of primordial black holes and the dark matter searches. I will focus on how a sub-dominant component of PBHs interacts with the bulk of the DM. In particular, I will describe how a DM “mini-halo” is expected to form around PBHs, with relevant phenomenological consequences. The focus will be on two relevant effects. (i) If the bulk of the...

22. Timekeepers of the Universe: The recent gravitational wave observation by PTA and PBH.

Antonio Junior Iovino (Università degli studi di Roma "La Sapienza")

6/19/24, 9:40 AM

The recent data releases by multiple pulsar timing array (PTA) experiments show evidence for Hellings-Downs angular correlations indicating that the observed stochastic common spectrum can be interpreted as a stochastic gravitational wave background. We study whether the signal may originate from gravitational waves induced by high-amplitude primordial curvature perturbations. Such large...

60. Primordial monopoles, black holes and gravitational waves

Prof. Qaisar Shafi (Delaware U., Bartol Inst.)

TBC

16. Signatures of domain wall networks: from gravitational waves to primordial black holes

Ricardo Z. Ferreira (U. Coimbra)

The Domain Wall (DW) problem is the fact that DW networks that result from the spontaneous breaking of discrete symmetries tend to dominate the universe's energy budget.
However, if the symmetry is not exact the network annihilates and the problem turns into a virtue, as the network tends to be an abundant component before its collapse, and is thus easier to probe.
In this talk, I will...