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arXiv 0908.3741hep-ph
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2540公里基线超束实验的神奇特性

Magical properties of 2540 Km baseline Superbeam Experiment

Sushant K. Raut, Ravi Shanker Singh, S. Uma Sankar

摘要:

缺乏CP破坏相$\dcp$的任何信息削弱了我们确定中微子质量等级的能力。7500公里的魔术基线被提出来克服这个问题。然而,为了在这个很长的基线上获得足够大的通量,人们需要新的技术来产生高强度的中微子束。在这封信中,我们强调了2540 km基线的{ \it神奇}特性。在这样一个基线上,使用一个窄带中微子超束,其通量峰值在能量3.5 GeV附近,我们可以确定中微子质量等级{ \bf独立}的CP相。对于$\sin^2 2 θ_{13} \geq 0.05$,10千吨年的非常适度的暴露足以确定等级。对于$0.02 \leq \sin^2 2 θ_{13} \leq 0.05$,需要约10万吨年的暴露。

英文摘要:

Lack of any information on the CP violating phase $\dcp$ weakens our ability to determine neutrino mass hierarchy. Magic baseline of 7500 km was proposed to overcome this problem. However, to obtain large enough fluxes, at this very long baseline, one needs new techniques of generating high intensity neutrino beams. In this letter, we highlight the {\it magical} properties of a 2540 km baseline. At such a baseline, using a narrow band neutrino superbeam whose flux peaks around the energy 3.5 GeV, we can determine neutrino mass hierarchy {\bf independent} of the CP phase. For $\sin^2 2 θ_{13} \geq 0.05$, a very modest exposure of 10 Kiloton-years is sufficient to determine the hierarchy. For $0.02 \leq \sin^2 2 θ_{13} \leq 0.05$, an exposure of about 100 Kiloton-years is needed.

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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