5 papers · 1 filter
Neutrinos from Earth-Bound Dark Matter Annihilation
Maxim Pospelov, Anupam Ray
A sub-component of dark matter with a short collision length compared to a planetary size leads to efficient accumulation of dark matter in astrophysical bodies. We analyze possibl…
Probing Ultra-light Primordial Black Holes as a Dark Matter Candidate
Anupam Ray
Dark Matter (DM) is omnipresent in our universe. Despite its abundance, the microscopic identity of DM still remains a mystery. Primordial black holes (PBHs), possibly formed via g…
Dark matter capture in celestial objects: light mediators, self-interactions, and complementarity with direct detection
Basudeb Dasgupta, Aritra Gupta, Anupam Ray
We generalize the formalism for DM capture in celestial bodies to account for arbitrary mediator mass, and update the existing and projected astrophysical constraints on DM-nucleon…
Neutrino and Positron Constraints on Spinning Primordial Black Hole Dark Matter
Basudeb Dasgupta, Ranjan Laha, Anupam Ray
Primordial black holes can have substantial spin -- a fundamental property that has a strong effect on its evaporation rate. We conduct a comprehensive study of the detectability o…
Galactic Positron Excess from Selectively Enhanced Dark Matter Annihilation
Anirban Das, Basudeb Dasgupta, Anupam Ray
Precision measurements of the positron flux in cosmic ray have revealed an unexplained bump in the spectrum around , not clearly attributable to known as…