arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1507.07569hep-phastro-ph.HEastro-ph.SR
收藏

小尺度下超新星中微子的自诱导味转换

Self-induced flavor conversion of supernova neutrinos on small scales

Sovan Chakraborty, Rasmus Sloth Hansen, Ignacio Izaguirre, Georg Raffelt

摘要:

超新星中微子的自诱导味转换是中微子-中微子色散的一个普遍特征。味空间中相应的逃逸模式可以自发地打破中微子通量的原始对称性,特别是可以自发地产生小尺度的功能,如最近的示意图研究所示。然而,不可避免的“多角度物质效应”将这些小尺度的不稳定性转移到物质和中微子密度的区域,这些区域在从SN出来的路上不会遇到。在最大尺度上均匀的传统模式最容易出现不稳定性,因此为自诱导风味转换的出现提供了最灵敏的测试。作为一个副产品,我们澄清了膨胀中微子气体的时间演化和静态SN中微子通量的径向演化之间的关系。我们的结果取决于几个简化的假设,特别是平稳的解决方案,没有一个“向后”中微子通量所造成的剩余散射,和全球球形对称的排放。

英文摘要:

Self-induced flavor conversion of supernova (SN) neutrinos is a generic feature of neutrino-neutrino dispersion. The corresponding run-away modes in flavor space can spontaneously break the original symmetries of the neutrino flux and in particular can spontaneously produce small-scale features as shown in recent schematic studies. However, the unavoidable "multi-angle matter effect" shifts these small-scale instabilities into regions of matter and neutrino density which are not encountered on the way out from a SN. The traditional modes which are uniform on the largest scales are most prone for instabilities and thus provide the most sensitive test for the appearance of self-induced flavor conversion. As a by-product we clarify the relation between the time evolution of an expanding neutrino gas and the radial evolution of a stationary SN neutrino flux. Our results depend on several simplifying assumptions, notably stationarity of the solution, the absence of a "backward" neutrino flux caused by residual scattering, and global spherical symmetry of emission.

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。

↑