Gravitational Wave Probes of Physics Beyond Standard Model

Session

Inflationary Sources & PBH

GWINF

Jul 14, 2021, 2:00 PM

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.

31. Inflation after PLANCK

Jerome Martin (Institut d'Astrophysique de Paris)

7/14/21, 2:00 PM

I will review the current status of inflation and discuss how
one can improve it using new observational probes.

9. Dark neutrino interactions make inflationary CMB B-modes blue and phase out Hubble tension

Rishi Khatri (Tata Institute of Fundamental Research)

7/14/21, 2:40 PM

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...

32. Audible Axions from NANOGrav to the lattice

Pedro Klaus Schwaller

7/14/21, 3:05 PM

The dynamics of axions after inflation can give rise to an observable stochastic gravitational wave background. I will present new results for the GW spectrum from a lattice simulation of an axion-dark photon system in a radiation dominated universe, and furthermore show that this signal could explain the recently observed excess in the NANOGrav data.

33. Classical vs. quantum divide of gravitons in cosmology

Anupam Mazumdar (Groningen University)

7/14/21, 3:30 PM

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...

34. Gravitational waves from inflation

Emanuela Dimastrogiovanni (The University of New South Wales)

7/14/21, 4:10 PM

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...

35. Recent progress in cosmological collider physics

Zhong-Zhi Xianyu (Harvard University)

7/14/21, 4:50 PM

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,...

36. Black holes, gravitational waves, and avenues to new physics

Marc Kamionkowski (Johns Hopkins University)

7/14/21, 5:15 PM

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.

25. Gravitational waves and quantum gravity

Gianluca Calcagni

7/14/21, 5:40 PM

We will review recent results about the search for a cosmological imprint of quantum gravity in gravitational-wave physics.Tight constraints and a chance of detection for some models may come from modified dispersion relations, the luminosity distance of standard sirens and the stochastic gravitational-wave background.