3 papers
astro-ph.CO2025
Dark forces suppress structure growth
Marco Costa, Cyril Creque-Sarbinowski, Olivier Simon +1
No experimental test precludes the possibility that the dark matter experiences forces beyond general relativity -- in fact, a variety of cosmic microwave background observations s…
hep-ph2025
Invisible jets from composite neutrinos
Matteo Borrello, Marco Costa, Diego Redigolo
We propose a novel experimental probe of neutrino couplings to a composite sterile sector, leveraging the unique signature of neutrino disintegration into "invisible jets" in high-…
astro-ph.CO2025
From 100 kpc to 10 Gpc: Dark Matter self-interactions before and after DESI
Salvatore Bottaro, Emanuele Castorina, Marco Costa +2
We consider Dark Matter self-interactions mediated by ultralight scalars. We show that effectively massless mediators lead to an enhancement of the matter power spectrum, while hea…