Physics Beyond the Standard Model in Leptonic & Hadronic Processes and Relevant Computing Tools

Session

Research Talks of “Session 9”

28 Feb 2024, 15:00

Amphitheater "Alkis Argyriades" ( University of Athens, Greece )

22. Observational Challenges for the Standard Cosmological Model and Theoretical Models

Leandros Perivolaropoulos (U. of Ioannina)

I will briefly review the main challenges for the standard cosmological model that have been persisting and amplifying during the past few years and in particular the Hubble tension, the growth of perturbations tension and the cosmic dipoles that challenge the cosmological principle. Then I will focus on the Hubble tension which is effectively a calibrator tension and review the classes of...

26. Spherical Collapse and Sudden Singularities: Insights from the $\Lambda_{\rm s}$CDM Model

Evangelos Achilleas Paraskevas (University of Ioannina)

The $\Lambda_{\mathrm{s}}$CDM model, which posits a rapid transition from anti-de Sitter (AdS) to de Sitter (dS) vacua around redshift $z_{\dagger} \approx 2$, aims to resolve cosmological tensions, including those related to $H_0$ and $S_8$. This study examines the impact of a type II singularity at $z = z_{\dagger}$ on the evolution of cosmic structures, specifically the generalization of...

37. Tensions in Cosmology: Are we Approaching New Physics?

Prof. Emmanuel Saridakis (National Observatory of Athens)

We summarize the famous tensions between various observational datasets and theoretical predictions of the Standard Model of Cosmology, such as the H0 and S8 tensions, that could be a sign that we are approaching New Physics. Then we provide possible solutions, arising from modifications/extensions of the standard lore.