4 papers
Low Mass Black Holes from Dark Core Collapse
Basudeb Dasgupta, Ranjan Laha, Anupam Ray
Unusual masses of black holes being discovered by gravitational wave experiments pose fundamental questions about the origin of these black holes. Black holes with masses smaller t…
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…