Speaker
Tae-Sun Park
(Sungkyunkwan University)
Description
Aiming to resolve the so called lithium problem, we investigate the possibility that a small fraction of primordial particles can have non-thermal distribution for a short period of time of the BBN evolution. Our model is described by four parameters, which account the amount of fraction, the position and the width of time for the appearance of the particles, and the shape of the non-thermal distribution. By scanning the four-dimensional parametric space of wide range, we can find a set of points that give us a good agreement with the observational data including the primordial lithium abundance. Aspects of those solutions will be discussed.
