3 papers
hep-ph2026
Multi-messenger signal from QCD-Axion Ultracompact Minihalos
Dorian W. P. Amaral, Enrico D. Schiappacasse, Karla Tapia-Rebolledo
We explore the multimessenger signatures from ultracompact minihalos (UCMHs) seeded by stellar-mass primordial black holes (PBHs) and composed of QCD-axion dark matter. Using the s…
hep-ph2025
Constraining Dark Photon Dark Matter with Radio Silence from Soliton Mergers around Supermassive Black Holes
Dorian W. P. Amaral, Enrico D. Schiappacasse, Hong-Yi Zhang
We place the first constraints on the dark matter fraction contained within dark photon solitons using the absence of their predicted radio-frequency signatures, or radio silence,…
hep-ph2023
Rescuing The Primordial Black Holes all-Dark Matter Hypothesis from The Fast Radio Bursts Tension
Dorian W. P. Amaral, Enrico D. Schiappacasse
Primordial black holes (PBHs) as an all-dark matter (DM) hypothesis has recently been demotivated by the prediction that these objects would source an excessive rate of fast radio…