IRN@ZOOM

Session

Dark Universe

6 juil. 2021, 10:50

10. Interplay Between Dark Matter Freeze Out/In and Primordial Black Hole Evaporation

Lucien Heurtier (CPHT, Ecole Polytechnique)

06/07/2021 10:50

In this talk, I will present the phenomenology of dark-matter production in the case where it is both produced by a freeze-out or freeze-in mechanism and by the evaporation of primordial black holes. I will show that the presence of a vector mediator between the hidden and the visible sector affects the production of dark-matter particles as well as its phase space distribution. I will also...

14. Baryogenesis via relativistic bubble expansion

Iason Baldes (Universite Libre de Bruxelles)

06/07/2021 11:08

We consider a novel baryogenesis mechanism in which the asymmetry is sourced from heavy particles which either gain their mass or are created during bubble expansion in a strong first order phase transition. The particles are inherently out-of-equilibrium and sufficiently dilute after wall crossing so --- even with order one gauge interactions --- the third Sakharov condition is easily met....

11. Integral X-ray constraints on sub-GeV dark matter

Elena Pinetti

06/07/2021 11:26

Dark matter (DM) in cosmic structures is expected to produce signals originating from its particle physics nature, among which the electromagnetic emission represents a relevant opportunity. One of the major candidates for DM are weak-scale particles, however no convincing signal of them has been observed so far. For this reason, alternative candidates are getting increasing attention, notably...

12. Search for dark matter annihilation signals from unidentified Fermi-LAT objects with H.E.S.S.

Alessandro Montanari

06/07/2021 11:44

Cosmological N-body simulations show that Milky Way-sized galaxies harbor a population of unmerged dark matter subhalos. These subhalos could shine in gamma-rays and be eventually detected as unidentified sources in gamma-ray surveys. From a thorough selection of unidentified Fermi-LAT Objects (UFOs), we observe four UFOs with H.E.S.S. and we search for very high-energy (VHE, E ≥ 100 GeV)...

13. Dark Matter search in the Galactic Center with the ARCA KM3NeT detector

Camiel Pieterse

06/07/2021 12:02

The KM3NeT detector is a next generation neutrino telescope currently under construction in the Mediterranean sea. The detector is distributed in two sites each with a specific goal. The first of the detectors, called ARCA (Astroparticle Research with Cosmics in the Abyss) and located South of Sicily, is focused on astrophysical research. The second one, ORCA (Oscillation Research with Cosmics...