### Conveners

#### Inflationary Sources & PBH: Inflationary Sources & PBH

- Francesco Muia

#### Inflationary Sources & PBH: Inflationary Sources & PBH

- Claudia de Rham (Imperial College London)

#### Inflationary Sources & PBH: Panel Discussion

- Subodh Patil (University of Leiden (NL))

### Description

Probing BSM via primordial, secondary, (p)reheating-related tensor perturbations, scalar and tensor bi-spectrum, PBH, Affleck-Dine, q-ball, etc. scenarios.

I will review the current status of inflation and discuss how

one can improve it using new observational probes.

New interactions of neutrinos with a subdominant component of dark matter can prevent them from free streaming. As a result, the inflationary gravitational waves escape the damping by neutrinos and, with respect to the standard LCDM cosmology, there is enhancement of primordial gravitational wave amplitude and CMB B-modes on small scales. The effect on the CMB scalar acoustic oscillations is...

Gravity and matter are universally coupled, and this unique universality provides us with an intriguing way to quantifying quantum aspects of space-time in terms of the number of gravitons. In particular, I will provide a limit on the number of gravitons if we trace out the matter degrees of freedom. I will obtain the universal bound on the number of gravitons. Since the number of gravitons...

Inflation is an epoch in the very early universe, characterised by a nearly exponential expansion. It provides an explanation for the origin of cosmic structure and it is in excellent agreement with current observations. The particle physics description of inflation is, however, still largely unknown. Primordial gravitational waves have the potential to shed new light on this epoch. In this...

Heavy particles can be produced on shell during inflation and leave distinct signals in the correlations of density fluctuations. These signals can be searched for in the future CMB/LSS/21cm observations. In this talk I will introduce the basics of this cosmological collider program. I will then describe some recent works along this direction with fun physics and visibly large signals,...

I will begin by reviewing the possibility that primordial black holes may make up the dark matter. I will then describe an array of analyses that can be done with CMB data and galaxy surveys to look for the effects of Hubble-scale gravitational waves and also to seek chirality in the gravitational-wave background.