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arXiv 0802.1489hep-ph
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超新星中微子通量的味相关重建中的参数简并

Parameter Degeneracy in Flavor-Dependent Reconstruction of Supernova Neutrino Fluxes

H. Minakata, H. Nunokawa, R. Tomas, J. W. F. Valle

摘要:

我们重新审视重建超新星中微子的初始通量的可能性,在未来的核心坍缩银河系超新星爆炸和百万吨级的水切伦科夫探测器检测到。在我们的方法中的一个新的关键要素是列入,除了总的和每个中微子物种的平均能量,一个“捏”参数的特征的宽度的分布作为一个适合的参数。在这种情况下,我们发现在中微子层的超新星中微子通量的重建参数的连续简并。我们详细分析了这种退化的功能,并显示它是如何发生的,而不管用于分布函数的参数化。鉴于这种简并是真实的,我们简要地评论解决它的可能步骤,这必然需要超越这里提出的设置。

英文摘要:

We reexamine the possibility of reconstructing the initial fluxes of supernova neutrinos emitted in a future core-collapse galactic supernova explosion and detected in a Megaton-sized water Cherenkov detector. A novel key element in our method is the inclusion, in addition to the total and the average energies of each neutrino species, of a "pinching" parameter characterizing the width of the distribution as a fit parameter. We uncover in this case a continuous degeneracy in the reconstructed parameters of supernova neutrino fluxes at the neutrinosphere. We analyze in detail the features of this degeneracy and show how it occurs irrespective of the parametrization used for the distribution function. Given that this degeneracy is real we briefly comment on possible steps towards resolving it, which necessarily requires going beyond the setting presented here.

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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