3 papers
hep-ph2025
Multi-messenger FIMP
Debasish Borah, Nayan Das, Sahabub Jahedi +1
We propose a multi-messenger frontier probe of non-thermal or freeze-in massive particle (FIMP) dark matter (DM) by considering an effective field theory (EFT) setup. Assuming lept…
hep-ph2025
Possible origin of the KM3-230213A neutrino event from dark matter decay
Debasish Borah, Nayan Das, Nobuchika Okada +1
We study the possibility of the highest energy neutrino event with 220 PeV energy, detected recently by the KM3NeT experiment to be originating from heavy dark matter (DM) decay. C…
hep-ph2025
Axion misalignment with memory-burdened PBH
Disha Bandyopadhyay, Debasish Borah, Nayan Das
We study the possibility of producing axion dark matter (DM) via misalignment mechanisms in a non-standard cosmological era dominated by ultra-light primordial black holes (PBH). W…