高能天体物理中微子逆味映射中的参数简并性与信息丢失
Parameter degeneracy and information loss in inverse flavor mapping for high-energy astrophysical neutrinos
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中文总结 AI 辅助
本文研究高能天体物理中微子逆味映射中的参数简并性与信息丢失,探讨行列式为零时的约束,并利用IceCube数据评估源味分布的可映射性。
中文摘要 AI 辅助
给定一个高能天体物理中微子通量,其源味比 $\eta = \{\eta^{}_e, \eta^{}_\mu, \eta^{}_\tau\}$ 与中微子望远镜测得的 $f = \{f^{}_e, f^{}_\mu, f^{}_\tau\}$ 通过 $f = P \eta$ 相关联,其中 $P$ 的元素由四个轻子味混合参数组成。然而,现实的{\it 逆}味映射 $\eta = P^{-1} f$ 会遇到不可避免的参数简并性和信息丢失,尤其是在当前中微子振荡数据允许的 $\det P = 0$ 极限附近。本文探讨了 $\det P = 0$ 的参数关联条件,包括 $\mu$-$\tau$ 反射对称情形,制定了 $f^{}_e$ 和 $f^{}_\mu$ 相对于 $\eta^{}_e$ 和 $\eta^{}_\mu$ 的相应约束,并利用近期 IceCube 全天空中微子通量数据(能量范围从 5 TeV 到 10 PeV),在假设相关源具有共同味组成的前提下,说明了源味分布可被映射的程度。
英文摘要
Given a high-energy astrophysical neutrino flux, its source flavor ratios $η= \{η^{}_e, η^{}_μ, η^{}_τ\}$ are correlated with the ones $f = \{f^{}_e, f^{}_μ, f^{}_τ\}$ measured at a neutrino telescope via $f = P η$, where the elements of $P$ consist of four lepton flavor mixing parameters. But realistic {\it inverse} flavor mapping $η= P^{-1} f$ encounters unavoidable parameter degeneracy and information loss, especially in or near the $\det P = 0$ limit allowed by current neutrino oscillation data. In this work we explore the parameter correlation condition for $\det P = 0$ including the $μ$-$τ$ reflection symmetry case, formulate the corresponding constraints on $f^{}_e$ and $f^{}_μ$ versus $η^{}_e$ and $η^{}_μ$, and illustrate to what extent the source flavor distribution can be mapped by using the recent IceCube all-sky neutrino flux data ranging from 5 TeV to 10 PeV under the assumption that the relevant sources have a common flavor composition.
发表机构
- School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, UCAS(杭州高等研究院基础物理与数学学院)
- Institute of Theoretical Physics, Chinese Academy of Sciences(中国科学院理论物理研究所)
- University of Chinese Academy of Sciences(中国科学院大学)
- Institute of High Energy Physics, Chinese Academy of Sciences(中国科学院高能物理研究所)
- Center of High Energy Physics, Peking University(北京大学高能物理中心)
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