REMINDER High Energy Physics Seminar this week - Thursday (Garriga Torres)

[HECAP - Margherita Di Giovannantonio]

*_HIGH ENERGY PHYSICS SEMINAR_* - https://indico.ictp.it/event/10616/*__*



*Thursday, 25 January* 2024, at *16:00*  - *LUIGI STASI SEMINAR ROOM *

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Jaime Garriga Torres (University of Barcelona)

*“Diversity of Channels for Primordial Black Hole Production in Single 
Field Models of Inflation”*

_Abstract_

A class of inflationary scenarios for primordial black hole (PBH) 
formation include a small barrier in the slope of the potential. In such 
models, there are two competing channels for PBH formation. One is the 
standard gravitational collapse of large adiabatic perturbations. The 
other is the implosion of localized regions of false vacuum which remain 
trapped behind the barrier. We analyze such models, comparing both 
channels and establishing under what conditions one will dominate over 
the other. More generally, we comment on the significance of exponential 
tails in the PDF of the curvature perturbation variable, and the fact 
that in models with local type non-Gaussianity, the existence of 
alternative channels can be inferred from unitarity considerations.



<https://indico.ictp.it/event/10616/>


This is a hybrid event. *To join via Zoom*:

Zoom link: https://zoom.us/j/98584222826<https://zoom.us/j/98584222826>

Meeting ID: 985 8422 2826

Password: 170998