3 papers
hep-ph2026
What does it take to have at CMB times?
Miguel Escudero, Maksym Ovchynnikov, Neal Weiner
The vast majority of extensions of the Standard Model affecting the number of effective relativistic neutrino species () do so additively, namely, they enhance this qu…
astro-ph.CO2025
Not-quite-primordial black holes
Wenzer Qin, Soubhik Kumar, Priyamvada Natarajan +1
We propose a new mechanism for the formation of seeds of supermassive black holes at early cosmic epochs. Enhanced density fluctuations with amplitudes that are not large enough to…
astro-ph.CO2025
Early Galaxies from Rare Inflationary Processes and JWST Observations
Soubhik Kumar, Neal Weiner
Rare Poisson processes (PP) during cosmic inflation can lead to signatures that are localized in position space and are not well captured by the standard two- or higher-point corre…