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arXiv 1809.01063hep-phastro-ph.SRnucl-thphysics.space-ph
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中微子混合对核塌缩超新星中电子分数的影响

Effects of neutrino mixing upon electron fraction in core collapse supernovae

M. M. Saez, M. E. Mosquera, O. Civitarese

摘要:

大质量中微子的加入影响了重核形成的截面,改变了它们的丰度。快速中子俘获过程(r-过程)通常与爆炸事件有关,如核心坍缩超新星。本文研究了活动和惰性中微子振荡和相互作用对中微子通量、重子密度和物质电子分数的影响。我们考虑了两种不同的中微子初始分布函数和不同的混合参数组合(包括θ 34 = 0)。我们使用密度矩阵的形式进行计算,包括中微子振荡的影响,与物质的相互作用和自中微子相互作用。我们发现,中微子与物质的相互作用和与自己改变电子分数,影响r过程的开始。

英文摘要:

The inclusion of massive neutrinos affects the cross sections involved in the formation of heavy nuclei, modifying their abundances. Rapid neutron capture processes (r-process) are often associated with explosive events such as core-collapse supernovae. In this work we study the effects of active and sterile neutrino oscillations and interactions, upon the calculation of neutrino fluxes, the baryonic density and the electron fraction of the material. We have considered two different initial distribution functions of the neutrinos and different combinations of mixing parameters (including θ 34 = 0). We use the formalism of density matrices for the calculations and included the effects of neutrino oscillations, interactions with matter and self-neutrino interactions. We found that the interactions of the neutrinos with matter and with themselves change the electron fraction, affecting the onset of the r-process.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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