5 papers
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…
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…
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…
Asymmetries from a charged memory-burdened PBH
Basabendu Barman, Kousik Loho, Ãscar 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…
Constraining burdened PBHs with gravitational waves
Basabendu Barman, Kousik Loho, Ãscar Zapata
We investigate the implications of memory burden on the gravitational wave (GW) spectrum arising from the Hawking evaporation of light primordial black holes (PBHs). By considering…