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arXiv 1310.0076hep-ex
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在MiniBooNE +实验中提高灵敏度的电子中微子出现振荡的新研究

A new investigation of electron neutrino appearance oscillations with improved sensitivity in the MiniBooNE+ experiment

R. Dharmapalan, S. Habib, C. Jiang, I. Stancu, Z. Djurcic, R. A. Johnson, A. Wickremasinghe, G. Karagiorgi, M. H. Shaevitz, B. C. Brown, F. G. Garcia, R. Ford, … 展开作者

R. Dharmapalan, S. Habib, C. Jiang, I. Stancu, Z. Djurcic, R. A. Johnson, A. Wickremasinghe, G. Karagiorgi, M. H. Shaevitz, B. C. Brown, F. G. Garcia, R. Ford, W. Marsh, C. D. Moore, D. Perevalov, C. C. Polly, J. Grange, J. Mousseau, B. Osmanov, H. Ray, R. Cooper, R. Tayloe, R. Thornton, G. T. Garvey, W. Huelsnitz, W. C. Louis, C. Mauger, G. B. Mills, Z. Pavlovic, R. Van de Water, D. H. White, R. Imlay, M. Tzanov, B. P. Roe, A. A. Aguilar-Arevalo, T. Katori, P. Nienaber

摘要:

我们建议在现有的MiniBooNE探测器中添加闪烁体,以测试MiniBooNE低能量过剩的中性电流/充电电流(NC/CC)性质。闪烁体将使2.2 MeV的$γ$的重建中子捕获质子中微子相互作用。在观察到振荡过剩的低能CC相互作用中,关联中子的概率应小于10%。这与NC背景相反,NC背景在大约50%的事件中应该有相关的中子。我们将用$ν_μ$ CC和NC事件测量这些中子分数,以消除系统的不确定性。该中子分数测量需要将靶上的$6.5\times10^{20}$质子输送至MiniBooNE,并添加闪烁体,以将振荡过量的显著性增加至超过$5σ$。MiniBooNE的这一新阶段还将使其他重要的研究成为可能,例如通过NC弹性散射的核子自旋结构($Δs$),通过$\numu ^{12}C \rightarrow μ^{-} ^{12}N_\textrm{g.s.}$散射的中微子通量的低能测量,以及中微子能量重建中准弹性假设的测试。这些主题将在未来5年内以适度的成本产生重要的、高引用率的结果,并将有助于训练博士。学生和博士后。该企业提供补充信息,从即将到来的液体氩为基础的MicroBooNE实验。此外,MicroBooNE计划在2014年初接收中微子,并且向MiniBooNE提供光束的额外成本很小。

英文摘要:

We propose the addition of scintillator to the existing MiniBooNE detector to allow a test of the neutral-current/charged-current (NC/CC) nature of the MiniBooNE low-energy excess. Scintillator will enable the reconstruction of 2.2 MeV $γ$s from neutron-capture on protons following neutrino interactions. Low-energy CC interactions where the oscillation excess is observed should have associated neutrons with less than a 10% probability. This is in contrast to the NC backgrounds that should have associated neutrons in approximately 50% of events. We will measure these neutron fractions with $ν_μ$ CC and NC events to eliminate that systematic uncertainty. This neutron-fraction measurement requires $6.5\times10^{20}$ protons on target delivered to MiniBooNE with scintillator added in order to increase the significance of an oscillation excess to over $5σ$. This new phase of MiniBooNE will also enable additional important studies such as the spin structure of nucleon ($Δs$) via NC elastic scattering, a low-energy measurement of the neutrino flux via $\numu ^{12}C \rightarrow μ^{-} ^{12}N_\textrm{g.s.}$ scattering, and a test of the quasielastic assumption in neutrino energy reconstruction. These topics will yield important, highly-cited results over the next 5 years for a modest cost, and will help to train Ph.D. students and postdocs. This enterprise offers complementary information to that from the upcoming liquid Argon based MicroBooNE experiment. In addition, MicroBooNE is scheduled to receive neutrinos in early 2014, and there is minimal additional cost to also deliver beam to MiniBooNE.

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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