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arXiv 1907.01059hep-ph
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探测超K超新星中微子与非标准中微子的相互作用

Probing Non-Standard Neutrino Interactions with Supernova Neutrinos at Hyper-K

Minjie Lei, Noah Steinberg, James D. Wells

摘要:

非标准中微子自相互作用(NSSI)可能比费米相互作用更强。我们调查的能力,以约束这些四中微子相互作用的影响,中微子的流量源自银河系超新星。在核塌缩超新星的稠密介质中,这些新的自相互作用可以对中微子振荡产生显著的影响,导致味演化和光谱水平的变化。我们使用模拟的中微子通量从13太阳质量,核心坍缩超新星在10千秒差距,并数值传播这些中微子通过恒星介质考虑真空/MSW振荡,SM $ν-ν$散射以及$ν-ν$的相互作用,所产生的NSSI。我们将由此产生的中微子通量传递给未来的Hyper-Kamiokande探测器的模拟,看看当下一个银河系超新星变得可见时,对NSSI参数的约束是可能的。我们发现,这些约束强烈依赖于中微子质量层次结构,如果NSSI是违反或保存的味道。在Hyper-K下,正常层次(NH)中对NSSI的敏感性受到实验有效检测$ν_{e}$的能力的限制,但如果NSSI特别强,则可以看到与无NSSI的偏差。在倒置层次(IH)的情况下,Hyper-K可以显着提高约束的味道违反NSSI下降到$\mathcal{O}(10^{-1})G_{F}$。

英文摘要:

Non-standard neutrino self interactions (NSSI) could be stronger than Fermi interactions. We investigate the ability to constrain these four-neutrino interactions by their effect on the flux of neutrinos originating from a galactic supernova. In the dense medium of a core collapse supernova, these new self interactions can have a significant impact on neutrino oscillations, leading to changes at the flavor evolution and spectra level. We use simulations of the neutrino flux from a 13 solar mass, core collapse supernova at 10 kpc away, and numerically propagate these neutrinos through the stellar medium taking into account vacuum/MSW oscillations, SM $ν-ν$ scattering as well as $ν-ν$ interactions that arise from NSSI. We pass the resulting neutrino flux to a simulation of the future Hyper-Kamiokande detector to see what constraints on NSSI parameters are possible when the next galactic supernova becomes visible. We find that these constraints depend strongly on the neutrino mass hierarchy and if the NSSI is flavor-violating or preserving. Sensitivity to NSSI in the normal hierarchy (NH) at Hyper-K is limited by the experiment's ability to efficiently detect $ν_{e}$, but deviations from no NSSI could be seen if the NSSI is particularly strong. In the inverted hierarchy (IH) scenario, Hyper-K can significantly improve constraints on flavor-violating NSSI down to $\mathcal{O}(10^{-1})G_{F}$.

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