10 citations · 18 across the 9 of their papers we have counts for
8 papers · 1 filter
Impact of Bubble Nucleation History and Friction on Primordial Black Hole Formation
Tathagata Ghosh, Kousik Loho, Sudip Manna
Cosmological first-order phase transitions (FOPTs) in the early Universe are an exciting prediction of many beyond the Standard Model scenarios. Owing to the stochastic nature of b…
Primordial black hole evaporation in a thermal bath and gravitational waves
Arnab Chaudhuri, Kousik Loho
Primordial black holes (PBHs) formed in the early Universe evaporate via Hawking radiation and constitute a generic source of stochastic gravitational waves. Existing studies of gr…
From Symmetry Breaking to Majoron Cosmology: Insights from NANOGrav 15-year Data
Tathagata Ghosh, Kousik Loho, Sudip Manna
We study the cosmology of a modified majoron model motivated by the need to protect a global symmetry from gravity-induced hard explicit breaking (by operators) a…
Asymmetries from a charged memory-burdened PBH
Basabendu Barman, Kousik Loho, Óscar Zapata
We explore a purely gravitational origin of observed baryon asymmetry and dark matter (DM) abundance from asymmetric Hawking radiation of light primordial black holes (PBH) in pres…
Multicomponent Scalar Dark Matter with an Extended Gauge Sector
Baradhwaj Coleppa, Kousik Loho, Agnivo Sarkar
We consider an extension of the Standard Model of particle physics with an additional gauge sector along with an additional scalar bidoublet and a non-linear sigma field. T…
Dark matter production from two evaporating PBH distributions
Arnab Chaudhuri, Baradhwaj Coleppa, Kousik Loho
Particulate Dark Matter (DM), completely isolated from the Standard Model particle sector, can be produced in the early universe from Primordial Black Hole (PBH) evaporation. Howev…
Dark Sector extensions of the Littlest Seesaw in the presence of Primordial Black Holes
Baradhwaj Coleppa, Kousik Loho, Sujay Shil
The Littlest Seesaw model is a very well motivated dark matter model. Here we consider an extension of that model with an additional scalar and an additional fermionic particle und…
An update on the two singlet Dark Matter model
Tanushree Basak, Baradhwaj Coleppa, Kousik Loho
We revisit the two real singlet extension of the Standard Model with a symmetry. One of the singlet scalars , by virtue of an unbroken symm…