Third EuCAPT Annual Symposium

Session

Early Universe

1 Jun 2023, 09:30

500/1-001 - Main Auditorium (CERN)

Conveners

Early Universe

• Silvia Pascoli

Early Universe

• Silvia Pascoli

36. Warm Inflation

Mehrdad Mirbabayi

01/06/2023, 09:30

35. Charting the baryogenesis landscape

Julia Harz

01/06/2023, 10:00

37. Primordial black hole formation

Ville Vaskonen

01/06/2023, 11:15

6. Robust constraints on the primordial spectrum from DM mini halos and the CMB anisotropies

Guillermo Franco Abellán

01/06/2023, 11:45

early universe cosmology

Although the CMB and galaxy surveys provide precise measurements of the primordial power spectrum at large scales, the small-scale power spectrum remains largely unconstrained. An enhancement in the small-scale primordial spectrum can lead to the formation of Ultra-Compact-Mini-Halos (UCMH) much earlier than standard halo can form. As a result, the DM annihilation signal receives a boost than...

14. Gravity as a Portal to Reheating, Leptogenesis and Dark Matter

Basabendu Barman

01/06/2023, 11:52

early universe cosmology

We show that a minimal scenario, utilizing only the graviton as an intermediate messenger between the inflaton, the dark sector and the Standard Model (SM), is able to generate simultaneously the observed relic density of dark matter (DM), the baryon asymmetry through leptogenesis, as well as a sufficiently hot thermal bath after inflation. The possibility of reheating via minimal...

24. The Cosmological Flow : a Systematic Approach to Primordial Correlators

Denis Werth

01/06/2023, 11:59

early universe cosmology

Correlation functions of primordial density fluctuations provide an exciting probe of the physics governing the earliest moments of our Universe. However, the standard approach to compute them is technically challenging. Theoretical predictions are therefore available only in restricted classes of theories, which can completely bias the interpretation of data.

In this talk, I will present...

74. Real scalar phase transitions: bubble nucleation, nonperturbatively

Anna Kormu

01/06/2023, 12:06

early universe cosmology

In the Standard Model the electroweak phase transition is a crossover, but in many beyond the Standard Model theories the transition is of first order. Strong first order phase transitions could produce gravitational waves that might be detectable by the Laser Interferometer Space Antenna (LISA). Perturbation theory is commonly used to estimate the parameters that enter the calculation of...

85. Dissipative effects during inflation

Alejandro Perez Rodriguez (Universidad Autonoma de Madrid)

01/06/2023, 12:13

early universe cosmology

Introducing an energy transfer between the inflaton field and a thermal bath modifies the primordial power spectrum $\mathcal{P}_\mathcal{R}$ due to the thermal fluctuations acting as a stochastic source for the curvature perturbations. We propose a fast and accurate method to compute $\mathcal{P}_\mathcal{R}$ in this context based on the Fokker-Planck equation, and verify its consistency...

117. Reheating dynamics of dark sectors

Helena Kolesova (Institute for Theoretical Physics, University of Bern)

01/06/2023, 12:20

early universe cosmology

As the nature of dark matter remains unresolved, existence of a whole dark sector is an intriguing possibility. It is also natural to assume that such dark sector couples to inflationary dynamics. As an example, we consider the case of warm axion inflation coupled to a non-Abelian dark sector, both in weakly and strongly coupled regime. We show that this simple setup provides rich...

39. Discussion

167. Lightning Talk (Q&A)

38. Lightning Talk 1

Denis WERTH

162. Lightning Talk 2

Alejandro PEREZ RODRIGUEZ

163. Lightning Talk 3

Guillermo FRANCO ABELLÁN

164. Lightning Talk 4

Anna KORMU

165. Lightning Talk 5

Helena KOLESOVA

166. Lightning Talk 6

BARMAN BASABENDU

197. Q&A

196. Q&A

195. Q&A

194. Q&A

193. Q&A

192. Q&A