Lepton asymmetry and neutrino oscillations interplay
Lepton asymmetry and neutrino oscillations interplay
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轻子不对称性和中微子振荡相互作用
DOI：
10.1007/s10751-013-0790-0
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发表时间：
2013
影响因子：
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通讯作者：
D. Kirilova
中科院分区：
文献类型：
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作者：
D. Kirilova
我们讨论了早期宇宙中轻子不对称性L和ν振荡之间的相互作用。中微子振荡可以抑制或增强先前存在的L。另一方面，L能够抑制或增强中微子振荡。数值分析了早期宇宙MSW共振ν振荡L增强的机制。讨论了ν振荡的L宇宙学效应。我们讨论了L如何改变宇宙学BBN对中微子的约束，并指出具有振荡的BBN模型对L是极其敏感的，它允许得到对L值最严格的约束。我们还讨论了由BBN、CMB和LSS数据以及对整体ν数据的分析所指出的关于早期宇宙中额外相对论密度的指示中，活动-无菌ν混合和L的宇宙学作用。
We discuss the interplay between lepton asymmetry L andνoscillations 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 resonantνoscillations in the early Universe is numerically analyzed. L cosmological effects throughνoscillations are discussed. We discuss how L may change the cosmological BBN constraints on neutrino and show that BBN model withoscillations is extremely sensitive to L - it allows to obtain the most stringent constraints on L value. We discuss also the cosmological role of active-sterileνmixing 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 globalνdata.