5 papers
Constraints on the inflationary vacuum and reheating era from NANOGrav
Debtosh Chowdhury, Rounak Nath, Sudipta Show
NANOGrav and various pulsar timing array experiments recently reported evidence for a common red noise signal across millisecond pulsars. This signal exhibits Hellings-Downs inter-…
Unraveling Freeze-in Dark matter through the echoes of gravitational waves
Partha Konar, Sudipta Show
In the quest to unravel the dark sector, feebly interacting freeze-in dark matter presents an intriguing possibility, plausibly explaining the consistent null results from various…
Unveiling a Hidden Epoch: Impact of Mediator Induced Matter Domination in Freeze-in Dark Matter
Partha Konar, Sudipta Show
Freeze-in dark matter has recently garnered significant attention as a promising framework due to its feeble interactions, which are consistent with the null results from dark matt…
Delayed Charged Lepton Yukawa Equilibration in Minimal Seesaw
Rishav Roshan, Sudipta Show
While most studies of the \textit{minimal type-I seesaw} neglect the heaviest decoupled right-handed neutrino, assuming negligible contributions to neutrino masses and leptogenesis…
Collider fingerprints of freeze-in dark matter produced during the fast expansion phase of Universe
Anupam Ghosh, Partha Konar, Sudipta Show
We examine a simple dark sector extension where the observed dark matter (DM) abundance arises from a freeze-in process through the decay of heavy vector-like quarks into a scalar…