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arXiv 1801.04855hep-phhep-ex
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T2HK中轻无菌中微子的特征

Signatures of a Light Sterile Neutrino in T2HK

Sanjib Kumar Agarwalla, Sabya Sachi Chatterjee, Antonio Palazzo

摘要:

我们研究了T2HK在光eV级无菌中微子存在下的性能。我们详细研究了它在解决基本问题,如质量等级,CP违反(CPV)引起的标准CP相位$δ_{13}$和新的CP相位$δ_{14}$,和八分圆的$θ_{23}$的歧义。我们第一次详细地表明,由于令人印象深刻的能量重建能力的T2 HK,可用的光谱信息起着重要的作用,以提高质量层次发现达到本实验在3 $ν$框架,并保持它几乎完好无损,即使在$4ν$计划。由于$δ_{14}$,该特征在建立CPV时也是极其重要的。就对$δ_{13}$引起的CPV的敏感性而言,从$3ν$到4例$ν$病例变化不大。我们还研究了两个相位$δ_{13}$和$δ_{14}$的重建能力,发现T2 HK中$δ_{13}$($δ_{14}$)上的典型1 $σ$不确定性是$\sim15^0$($30^0$)。在确定$θ_{23}$的八分圆时,我们面临着对未知$δ_{13}$和$δ_{14}$的不利组合的灵敏度完全丧失。

英文摘要:

We investigate the performance of T2HK in the presence of a light eV scale sterile neutrino. We study in detail its influence in resolving fundamental issues like mass hierarchy, CP-violation (CPV) induced by the standard CP-phase $δ_{13}$ and new CP-phase $δ_{14}$, and the octant ambiguity of $θ_{23}$. We show for the first time in detail that due to the impressive energy reconstruction capabilities of T2HK, the available spectral information plays an important role to enhance the mass hierarchy discovery reach of this experiment in 3$ν$ framework and also to keep it almost intact even in $4ν$ scheme. This feature is also of the utmost importance in establishing the CPV due to $δ_{14}$. As far as the sensitivity to CPV due to $δ_{13}$ is concerned, it does not change much going from $3ν$ to 4$ν$ case. We also examine the reconstruction capability of the two phases $δ_{13}$ and $δ_{14}$, and find that the typical 1$σ$ uncertainty on $δ_{13}$ ($δ_{14}$) in T2HK is $\sim15^0$ ($30^0$). While determining the octant of $θ_{23}$, we face a complete loss of sensitivity for unfavorable combinations of unknown $δ_{13}$ and $δ_{14}$.

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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