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Pair production with capture by energetic cosmic ray nuclei in a photon background
AmirFarzan Esmaeili, Arman Esmaili, Pasquale Dario Serpico
We investigate the ionization state of very energetic cosmic ray nuclei in photon fields, such as the cosmic microwave background (CMB) in extragalactic propagation and the environ…
CMB and accretion
Pasquale Dario Serpico
Primordial black holes (PBHs) of stellar mass or heavier would accrete baryonic gas, which becomes denser and hotter, injecting energetic photons in the cosmological medium soon af…
Primordial black hole formation from self-resonant preheating?
Guillermo Ballesteros, Joaquim Iguaz Juan, Paquale D. Serpico +1
We revisit the question of how generic is the formation of primordial black holes via self-resonant growth of inflaton fluctuations in the post-inflationary, preheating phase. Usin…
A closer scrutiny of cosmic ray proton energy losses
AmirFarzan Esmaeili, Arman Esmaili, Pasquale Dario Serpico
The percent-level precision attained by modern cosmic ray (CR) observations motivates reaching a comparable or better control of theoretical uncertainties. Here we focus on energy-…
Sub-GeV Dark Matter Annihilation: Limits from Milky Way observations with INTEGRAL
Thomas Siegert, Francesca Calore, Pasquale Dario Serpico
From 16 years of INTEGRAL/SPI -ray observations, we derive bounds on annihilating light dark matter particles in the halo of the Milky Way up to masses of about 300 MeV. We test…