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Arxiv: Early Galaxies from Rare Inflationary Processes and JWST Observations Published: 2/12/2025 9:00:00 PM Updated: 2/12/2025 9:00:00 PM

Paper abstract: Rare Poisson processes (PP) during cosmic inflation can lead to signaturesthat are localized in position space and are not well captured by the standardtwo- or higher-point correlation functions of primordial density perturbations.As an example, PP can lead to localized overdense regions that are far denserthan the ones produced through standard inflationary fluctuations. As a result,such overdense regions collapse earlier than expected based on the standard\LambdaCDM model and would host anomalously high-redshift galaxies. Wedescribe some general aspects of such PP and consider a particular realizationin the context of inflationary particle production. We then show that themasses and redshifts of the resulting galaxies can lie in a range discoverableby the James Webb Space Telescope (JWST) and future surveys, while beingconsistent with existing constraints on the matter power spectrum and UVluminosity functions at lower redshifts.