Speaker
Mr
ARPAN HAIT
(Indian Institute of Technology Kanpur)
Description
The existence of an early matter-dominated epoch prior to the big bang nucleosynthesis (BBN) may lead to a scenario where thermal dark matter cools faster than the plasma before the onset of reheating. This extra cooling reduces the free-streaming horizon of the dark matter compared to the usual radiation-dominated cosmology. Enhanced matter perturbations for scales entering the horizon before reheating, together with the reduced free-steaming horizon of the dark matter boosts the number density of sub-earth mass halos.
In this talk, I will illustrate how this enhancement in the number density of sub-earth halos can be utilized to probe various non-standard cosmological scenarios prior to the BBN.
| Track type | Astroparticle Physics |
|---|
Author
Mr
ARPAN HAIT
(Indian Institute of Technology Kanpur)
Co-authors
Dr
Avik Banerjee
(Tata institute of fundamental research, Mumbai)
Prof.
Debtosh Chowdhury
(Indian Institute of Technology Kanpur)
Mr
Sariful Islam
(Indian Institute of Technology Kanpur)
