Lepton asymmetry and neutrino oscillations interplay

被引：7
|
作者：
Kirilova, Daniela [1 ,2 ]
机构：
[1] Bulgarian Acad Sci, Inst Astron, Sofia, Bulgaria
[2] Bulgarian Acad Sci, NAO, Sofia, Bulgaria
来源：
HYPERFINE INTERACTIONS | 2013年 / 215卷 / 1-3期
关键词：
Lepton asymmetry; Neutrino oscillations; BBN; EARLY UNIVERSE; NONEQUILIBRIUM NEUTRINO; BOUNDS; NUCLEOSYNTHESIS; AMPLIFICATION; PARAMETERS; SPECTRUM;
D O I：
10.1007/s10751-013-0790-0
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
We discuss the interplay between lepton asymmetry L and nu oscillations in the early Universe. Neutrino oscillations may suppress or enhance previously existing L. On the other hand L is capable to suppress or enhance neutrino oscillations. The mechanism of L enhancement in MSW resonant nu oscillations in the early Universe is numerically analyzed. L cosmological effects through nu oscillations are discussed. We discuss how L may change the cosmological BBN constraints on neutrino and show that BBN model with oscillations is extremely sensitive to L - it allows to obtain the most stringent constraints on L value. We discuss also the cosmological role of active-sterile nu mixing and L in connection with the indications about additional relativistic density in the early Universe, pointed out by BBN, CMB and LSS data and the analysis of global nu data.
引用
收藏
页码：111 / 118
页数：8
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