32 citations · 141 across the 13 of their papers we have counts for
14 papers
Cosmological Consequences of a Highly Decoupled Right-handed Neutrino
Stephen F. King, Rishav Roshan, Sudipta Show
In the minimal type-I seesaw, one right-handed neutrino (RHN) can decouple from neutrino mass generation. Such a state is usually neglected, yet its feeble couplings make it long-l…
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 compelling evidence for a stochastic gravitational wave background (SGWB). Such a background may originate fr…
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…
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…
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…
SIMP dark matter during reheating
Debtosh Chowdhury, Sudipta Show
Strongly interacting massive particle (SIMP) has become one of the promising dark matter (DM) candidates due to its capability of addressing the small-scale anomaly, where the fina…
Unitarity Bound on Dark Matter in Low-temperature Reheating Scenarios
Nicolás Bernal, Partha Konar, Sudipta Show
Model-independent theoretical upper bound on the thermal dark matter (DM) mass can be derived from the maximum inelastic DM cross-section featuring the whole observed DM abundance.…
Jet substructure probe to unfold singlet-doublet dark matter in the presence of non-standard cosmology
Prasanta Kumar Das, Partha Konar, Saumyen Kundu +1
We examine the singlet-doublet fermionic dark matter model, where the non-thermal production of the dark matter in light of a non-standard cosmology demands a significantly large i…
Thermally corrected masses and freeze-in dark matter: a case study
Nabarun Chakrabarty, Partha Konar, Rishav Roshan and +1
If coupled \emph{feebly} to the Standard Model bath, a dark matter can evade the severe constraints from the direct search experiments. At the same time, such interactions help pro…
Self-interacting freeze-in dark matter in a singlet doublet scenario
Purusottam Ghosh, Partha Konar, Abhijit Kumar Saha +1
We examine the non-thermal production of dark matter in a scalar extended singlet doublet fermion model where the lightest admixture of the fermions constitutes a suitable dark mat…
Freeze-in Dark Matter Through Forbidden Channel in
Partha Konar, Rishav Roshan, Sudipta Show
We examine a scenario for freeze-in production of dark matter, which occurs due to the large thermal correction to the mass of a decaying mediator particle present in the thermal b…
A dark clue to seesaw and leptogenesis in a pseudo-Dirac singlet doublet scenario with (non)standard cosmology
Partha Konar, Ananya Mukherjee, Abhijit Kumar Saha +1
We propose an appealing alternative scenario of leptogenesis assisted by dark sector which leads to the baryon asymmetry of the Universe satisfying all theoretical and experimental…
Linking the pseudo-Dirac dark matter and radiative neutrino mass in a singlet doublet scenario
Partha Konar, Ananya Mukherjee, Abhijit Kumar Saha +1
We examine simple extension of the standard model with a pair of fermions, one singlet and a doublet, in a common thread linking the dark matter problem with the smallness of neutr…