PIRSA:23110050

The recent gravitational wave observation by pulsar timing arrays and primordial black holes: the importance of non-gaussianities - VIRTUAL

Iovino, A. (2023). The recent gravitational wave observation by pulsar timing arrays and primordial black holes: the importance of non-gaussianities - VIRTUAL. Perimeter Institute. https://pirsa.org/23110050

Iovino, Antonio. The recent gravitational wave observation by pulsar timing arrays and primordial black holes: the importance of non-gaussianities - VIRTUAL. Perimeter Institute, Nov. 07, 2023, https://pirsa.org/23110050 

          @misc{ pirsa_PIRSA:23110050,
            doi = {10.48660/23110050},
            url = {https://pirsa.org/23110050},
            author = {Iovino, Antonio},
            keywords = {Particle Physics},
            language = {en},
            title = {The recent gravitational wave observation by pulsar timing arrays and primordial black holes: the importance of non-gaussianities - VIRTUAL},
            publisher = {Perimeter Institute},
            year = {2023},
            month = {nov},
            note = {PIRSA:23110050 see, \url{https://pirsa.org}}
          }

Antonio Iovino

Sapienza University of Rome

Talk number
PIRSA:23110050
Collection
Talk Type
Subject
Abstract

The recent data releases by multiple pulsar timing array (PTA) experiments show evidence for Hellings-Downs angular correlations indicating that the observed stochastic common spectrum can be interpreted as a stochastic gravitational wave background. We study whether the signal may originate from gravitational waves induced by high-amplitude primordial curvature perturbations. Such large perturbations may be accompanied by the generation of a sizable primordial black hole (PBH) abundance. We discuss in which scenarios the inclusion of non-Gaussianities in the computation of the abundance can lead to a signal compatible with the PTA experiments without overproducing PBHs.

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Zoom link https://pitp.zoom.us/j/95261778825?pwd=QndRd0xQVFpNVzk0VXpRUkNqR1JXZz09