A critical analysis of the Big Bang Nucleosynthesis

被引：4

作者：

Makki, Tahani R. ^{[1
]}

El Eid, Mounib F. ^{[1
]}

Mathews, Grant J. ^{[2
]}

机构：

[1] Amer Univ Beirut, Dept Phys, Beirut, Lebanon

[2] Univ Notre Dame, Ctr Astrophys, Dept Phys, Notre Dame, IN 46556 USA

来源：

MODERN PHYSICS LETTERS A | 2019年 / 34卷 / 24期

关键词：

Nucleosynthesis in the early universe; the lithium problem; neutrinos; non-standard physics; PRIMORDIAL HELIUM ABUNDANCE; SPITE LITHIUM PLATEAU; DEUTERIUM ABUNDANCE; DECAYING PARTICLES; BARYON DIFFUSION; HE-4; OSCILLATIONS; NEUTRINOS; SYSTEM;

D O I：

10.1142/S0217732319501943

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Standard Big Bang Nucleosynthesis (SBBN) represents one of the basic tools to understand the early evolution of the universe. In this paper, we reanalyze this process to focus on the so-called lithium problem. Li-7 is overproduced during SBBN compared to its primordial abundance as obtained from observations. For this reason, we extend the scenarios of SBBN in two directions: (i) equating all neutrino chemical potentials and including more neutrino families, (ii) varying neutrino chemical potentials independently. Since the so-called cosmological lithium problem is not resolved on nuclear/astrophysical ground, we argue that this problem should be examined by invoking nonstandard assumptions.

引用

页数：30

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