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hep-ph2025
Dark Recipe for the First Giants: From Population III Stars to Early Supermassive Black Holes via Dark Matter Capture
Sulagna Bhattacharya, Debajit Bose, Basudeb Dasgupta +2
The presence of supermassive black holes (SMBHs) at high redshifts (), as revealed by James Webb Space Telescope (JWST), challenges standard black hole (BH) formation scenario…
hep-ph2025
Profiling Dark Matter Spikes with Gravitational Waves from Accelerated Binaries
Avinash Tiwari, Prolay Chanda, Shasvath J. Kapadia +3
Dark matter halos can develop a density spike, e.g., around a galactic supermassive black hole, with the profile determined both by the galaxy's formatio…
hep-ph2025
Distinguishing Neutron Star vs. Low-Mass Black Hole Binaries with Late Inspiral & Postmerger Gravitational Waves Sensitivity to Transmuted Black Holes and Non-Annihilating Dark Matter
Sulagna Bhattacharya, Shasvath Kapadia, Basudeb Dasgupta
Gravitational wave signals from binary neutron star (BNS) mergers and binary low-mass black hole (BLMBH) mergers are highly similar in the early inspiral phase. Consequently, the a…