Screening corrections to electron capture rates and resulting constraints on primordial magnetic fields

被引：10

作者：

Luo, Yudong ^{[1
,2
]}

Famiano, Michael A. ^{[1
,3
]}

Kajino, Toshitaka ^{[1
,2
,4
,5
]}

Kusakabe, Motohiko ^{[1
,4
,5
]}

Balantekin, A. Baha ^{[1
,6
]}

机构：

[1] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[2] Univ Tokyo, Grad Sch Sci, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[3] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA

[4] Beihang Univ, Sch Phys, 37 Xueyuan Rd, Beijing 100083, Peoples R China

[5] Beihang Univ, Int Res Ctr Big Bang Cosmol & Element Genesis, 37 Xueyuan Rd, Beijing 100083, Peoples R China

[6] Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA

来源：

PHYSICAL REVIEW D | 2020年 / 101卷 / 08期

基金：

美国国家科学基金会;

关键词：

NUCLEOSYNTHESIS CONSTRAINTS; HALO-STARS; LITHIUM; STRENGTH; EVOLUTION; ABUNDANCE;

D O I：

10.1103/PhysRevD.101.083010

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 He-4 abundances are both consistent with the observational constraints.

引用

页数：9

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