6 papers
QCD axion misalignment during reheating
Disha Bandyopadhyay, Debasish Borah, Nayan Das
We study the production of QCD axion dark matter (DM) via vacuum and kinetic misalignment mechanisms during an extended reheating period after the end of slow-roll inflation. With…
LZ nuclear recoil event from inelastic singlet-doublet scalar dark matter
Disha Bandyopadhyay, Debasish Borah, Pankaj Borah
We study the possibility of explaining the recently reported high-energy nuclear recoil event by the LUX-ZEPLIN (LZ) collaboration within the framework of singlet-doublet scalar da…
High-Quality Axion Dark Matter at Gravitational Wave Interferometers
Disha Bandyopadhyay, Debasish Borah, Nayan Das +1
Gravitational effects are known to violate global symmetries, threatening the Peccei-Quinn (PQ) solution to the strong CP problem. Ultraviolet completions featuring a gauged …
Leptogenesis and neutrino mass with one right-handed neutrino and Higgs inflaton
Disha Bandyopadhyay, Debasish Borah, Suruj Jyoti Das +1
We propose a novel and minimal setup where the observed baryon asymmetry of the Universe and neutrino oscillation data can be satisfied with only one right-handed neutrino (RHN) an…
ALPy Cogenesis
Disha Bandyopadhyay, Debasish Borah, Arnab Dasgupta
We propose a novel cogenesis scenario by utilising the two-body decay of heavy right-handed neutrino (RHN) via an effective operator involving an axion-like particle (ALP) dark mat…
Axion misalignment with memory-burdened PBH
Disha Bandyopadhyay, Debasish Borah, Nayan Das
We study the possibility of producing axion dark matter (DM) via misalignment mechanisms in a non-standard cosmological era dominated by ultra-light primordial black holes (PBH). W…