Limits on active-sterile neutrino mixing and the primordial deuterium abundance

被引：22

作者：

Cardall, CY

Fuller, GM

机构：

[1] Department of Physics University of California, San Diego, CA

来源：

PHYSICAL REVIEW D | 1996年 / 54卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.54.R1260

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Studies of limits on active-sterile neutrino mixing derived from big bang nucleosynthesis (BBN) considerations are extended to consider the dependence of these constraints on the primordial deuterium abundance. This study is motivated by recent measurements of D/H in quasar absorption systems, which at present yield discordant results. Limits on active-sterile mixing are somewhat relaxed for high D/H (approximate to 2X 10(-4)). For low D/H (approximate to 2X10(-5)), no active-sterile neutrino mixing is allowed by currently popular upper limits on the primordial He-+ abundance Y. For such low primordial D/H values, the observational inference of active-sterile neutrino mixing by upcoming solar neutrino experiments would imply that Y has been systematically underestimated, unless there is new physics not included in standard BBN.

引用

页码：R1260 / R1263

页数：4

共 45 条

[1] STANDARD SOLAR MODELS, WITH AND WITHOUT HELIUM DIFFUSION, AND THE SOLAR NEUTRINO PROBLEM [J].