Dear OMEG members and colleagues,
We are pleased to announce an upcoming Journal Club (JC).
Anyone interested in the subject is welcome to participate.
9th OMEG JC Date :
Thursday, June 23, 2022
(2022년 6월 23일 목요일)
Place :
Physics seminar room(320) @ Baird hall
(베어드홀 물리학과 세미나실(320호))
Time :
16:30-17:30
Title : Screening corrections to electron capture rates and resulting constraints on primordial magnetic fields
Abstract : We explore screening effects arising from a relativistic magnetized plasma with applications to big bang nucleosynthesis (BBN).
The screening potential which depends on the thermodynamics of charged particles in the plasma is altered by the magnetic field.
We focus on the impact of screening on the electron capture interaction. Taking into account the correction in BBN arising from
a homogeneous primordial magnetic field (PMF), we constrain the epoch at which the PMF was generated and its strength during BBN.
Considering such screening corrections to the electron capture rates and using up-to-date observations of primordial elemental abundances,
we also discuss the possibility of solving the problem of underestimation of the deuterium abundance. We find for certain values of the PMF
strength predicted D and 4 He abundances are both consistent with the observational constraints.
References : M Famiano, AB Balantekin, T Kajino, M Kusakabe, K Mori, Y Luo
The Astrophysical Journal 898 (2), 163
Presenter: Eunseok Hwang (황은석)
Thank you for your attention.