Portorož 2025: Particle Physics from Early Universe to Future Colliders

Session

BSM

24 Apr 2025, 14:30

32. "Extreme energy cosmic rays: where do they all come from?”

Zurab Berezhiani

24/04/2025, 14:30

Plenary talk

Abstract: I discuss paradoxical situation in detection of the highest energy cosmic rays by Telescope Array and Pierre Auger experiments, in particular, a strong discrepancy between their results for cosmic ray fluxes at energies above the GZK cutoff, most notably at E>100 EeV. I also discuss ideas of new BSM physics and dark matter identity which could naturally resolve these paradoxes.

12. Gravothermalizing into primordial black holes, boson stars, and cannibal stars

Takeshi Kobayashi

24/04/2025, 14:52

Plenary talk

I will present a novel mechanism for producing primordial black holes (and beyond) in the post-inflation universe. The mechanism invokes an epoch of early matter domination, and self-interactions of the dominating particles, which trigger a gravothermal collapse of halos into black holes. The gravothermal collapse also gives rise to other exotic compact objects including boson stars, as well...

50. Q-balls perturbations in details

Dr Aleksandr Azatov (SISSA)

24/04/2025, 15:14

Plenary talk

I will briefly review the physics of the Q-balls. Particular attention will be paid on the Q balls interactions with its perturbations and its phenomenological aspects for the early universe.

59. Open String Axiverse

Rudin Petrossian-Byrne (ICTP)

24/04/2025, 16:10

Plenary talk

The cosmological history of axions is most predictive when their associated symmetry is restored in the post-inflationary universe, producing a network of cosmic strings. On the other hand, arguably the most well-motivated (high-quality) axions — those arising from extra dimensions and string theory — are often thought to be in tension with this scenario. In this talk, I explain how these are...

46. Topological structures and inflationary cosmology

Qaisar Shafi

24/04/2025, 16:32

Plenary talk

We discuss a variety of topological structures that are predicted in realistic extensions of the Standard Model.
We also show how primordial monopoles, cosmic strings and other extended structures can cope with cosmic inflation.

51. Searching for New Physics with Plasma Wakefield Colliders

Toby Opferkuch (CERN)

24/04/2025, 16:54

Plenary talk

Plasma wakefield acceleration offers a new path toward building compact, high-energy colliders, with the potential to open up fresh opportunities for new physics searches. In this talk, I’ll introduce the basic ideas behind the technology and discuss what a future plasma wakefield collider could look like. I’ll then explore its reach for discovering new particles using simple benchmark models,...