23 citations · 275 across the 31 of their papers we have counts for
5 papers · 1 filter
Dynamical horizons and Super-Translation transitions of the horizon
Ayan Chatterjee, Avirup Ghosh
A condition is defined which determines if a supertranslation is induced in the course of a general evolution from one isolated horizon phase to another via a dynamical horizon. Th…
Models of decaying FIMP Dark Matter: potential links with the Neutrino Sector
Laura Covi, Avirup Ghosh, Tanmoy Mondal +1
The absolute stability of a dark matter (DM) particle is not a binding requirement. Here we suggest a few scenarios where the DM particle is liable to decay via extremely feeble in…
Asymmetric dark matter from semi-annihilation
Avirup Ghosh, Deep Ghosh, Satyanarayan Mukhopadhyay
We show that a general semi-annihilation scenario, in which a pair of dark matter (DM) particles annihilate to an anti-DM, and an unstable state that can mix with or decay to stand…
On Super-Translation transition between Quasi-local Black holes
Amit Ghosh, Avirup Ghosh, Pritam Nanda
We re-explore the symmetries of a weakly isolated horizon (WIH) from the perspective of freedom in the choice of intrinsic data. The supertranslations are realized as additional sy…
Search for decaying heavy dark matter in an effective interaction framework: a comparison of -ray and radio observations
Avirup Ghosh, Arpan Kar, Biswarup Mukhopadhyaya
We investigate and compare the possibilities of observing decaying dark matter (DM) in -ray and radio telescopes. The special emphasise of the study is on a scalar heavy DM part…