Shigeru Kubono
29/06/2017, 09:30
Oral Presentation
The primordial nucleosynthesis(BBN) right after the big bang (BB) is one of the key elements that support the BB model. The BBN is well known that it produced primarily light elements, and explains reasonably most of the element abundances. However, there remains some interesting and serious questions.
One is an abundance problem, called the Li problem. The BBN simulations using recent...
Tony Ahn
29/06/2017, 09:55
Oral Presentation
Seiya Hayakawa
29/06/2017, 10:20
Oral Presentation
It has been known that the prediction of the primordial $^7$Li abundance by the standard
Big-Bang Nucleosynthesis (BBN) model is about 3 times larger than the observation, so called
the cosmological $^7$Li problem. The $^7$Li abundance strongly depends on the $^7$Be production.
The $^7$Be$(n, p)^7$Li reaction is considered as the main process to destroy $^7$Be during the BBN.
Although its...
Tae-Sun Park
(Sungkyunkwan University)
29/06/2017, 10:40
Oral Presentation
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...
