3 papers
astro-ph.CO2025
BOSS Constraints on Massive Particles during Inflation: The Cosmological Collider in Action
Giovanni Cabass, Oliver H. E. Philcox, Mikhail M. Ivanov +4
Massive particles leave imprints on primordial non-Gaussianity via couplings to the inflaton, even despite their exponential dilution during inflation: practically, the Universe ac…
astro-ph.CO2024
Improving cosmological analyses of HI clustering by reducing stochastic noise
Simon Foreman, Andrej Obuljen, Marko SimonoviÄ
High-number-density tracers of large-scale structure, such as the HI-rich galaxies measured by 21 cm intensity mapping, have low sampling noise, making them particularly promising…
astro-ph.CO2024
Cosmological Information in Perturbative Forward Modeling
Giovanni Cabass, Marko SimonoviÄ, Matias Zaldarriaga
We study how well perturbative forward modeling can constrain cosmological parameters compared to conventional analyses. We exploit the fact that in perturbation theory the field-l…