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The Second Radio Synchrotron Background Workshop: Conference Summary and Report
J. Singal, N. Fornengo, M. Regis +24
We summarize the second radio synchrotron background workshop, which took place June 15-17, 2022 in Barolo, Italy. This meeting was convened because available measurements of the d…
Dark Matter prospects with COSI: ALPs, PBHs and sub-GeV Dark Matter
Andrea Caputo, Michela Negro, Marco Regis +1
We study the prospects in the search of dark matter offered by the newly selected NASA MeV mission COSI (Compton Spectrometer and Imager). This instrument is designed and optimized…
Seeking dark matter with -ray attenuation
José Luis Bernal, Andrea Caputo, Gabriela Sato-Polito +2
The flux of high-energy astrophysical rays is attenuated by the production of electron-positron pairs from scattering off of extragalactic background light (EBL). We use the mo…
Hints of dark photon dark matter from observations and hydrodynamical simulations of the low-redshift Lyman- forest
James S. Bolton, Andrea Caputo, Hongwan Liu +1
Recent work has suggested that an additional per baryon of heating in the intergalactic medium is needed to reconcile hydrodynamical simulations with Lyma…
Dark photon superradiance quenched by dark matter
Enrico Cannizzaro, Laura Sberna, Andrea Caputo +1
Black-hole superradiance has been used to place very strong bounds on a variety of models of ultralight bosons such as axions, new light scalars, and dark photons. It is common lor…
A Stimulating Explanation of the Extragalactic Radio Background
Andrea Caputo, Hongwan Liu, Siddharth Mishra-Sharma +2
Despite an intense theoretical and experimental effort over the past decade, observations of the extragalactic radio background at multiple frequencies below 10 GHz are not underst…