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arXiv 0801.1660hep-phastro-ph
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瞬发超新星中微子爆发的光谱分裂:解析三味处理

Spectral split in prompt supernova neutrino burst: Analytic three-flavor treatment

B. Dasgupta, A. Dighe, A. Mirizzi, G. G. Raffelt

摘要:

核心坍缩超新星(SN)的瞬时nu_e爆发既受到物质诱导的味道转换的影响,也受到强烈的中微子-中微子折射效应的影响。对于最低质量的祖先,导致O-Ne-Mg核心SNe,物质密度分布可以如此之浅,以至于通常的MSW物质效应发生在靠近中微子球的密集中微子区域内。在这种情况下,在出现的频谱中发生"分裂“,即,Nu_e风味存活概率显示出阶梯状特征。我们解释这个功能分析作为一个'' MSW准备光谱分裂。在三种口味的处理中,台阶状的特征实际上是由两个狭窄的裂缝组成的。它们由在集体振荡下守恒的味轻子数的两种组合决定。

英文摘要:

The prompt nu_e burst from a core-collapse supernova (SN) is subject to both matter-induced flavor conversions and strong neutrino-neutrino refractive effects. For the lowest-mass progenitors, leading to O-Ne-Mg core SNe, the matter density profile can be so shallow that the usual MSW matter effects occur within the dense-neutrino region close to the neutrino sphere. In this case a ``split'' occurs in the emerging spectrum, i.e., the nu_e flavor survival probability shows a step-like feature. We explain this feature analytically as a ``MSW prepared spectral split.'' In a three-flavor treatment, the step-like feature actually consists of two narrowly spaced splits. They are determined by two combinations of flavor-lepton numbers that are conserved under collective oscillations.

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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