Experimental parameters for a Cerium 144 based intense electron antineutrino generator experiment at very short baselines
Experimental parameters for a Cerium 144 based intense electron antineutrino generator experiment at very short baselines
复制标题
极短基线下基于铈 144 的强电子反中微子发生器实验的实验参数
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
G. Tikhomirov
中科院分区：
文献类型：
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作者：
J. Gaffiot;T. Lasserre;G. Mention;M. Vivier;M. Cribier;M. Durero;V. Fischer;A. Letourneau;Eric Dumonteil;I. Saldikov;G. Tikhomirov
在过去的15年里，利用太阳、大气、长基线加速器和反应堆中微子实验，已经成功地建立了与小平方质量分裂Δ m2 <$0.1 eV 2相关的标准三中微子振荡范式。然而，这一公认的图像可能会受到异常结果报告在非常短的基线在这些实验中的一些。如果不是实验假象，这些结果可能被解释为至少存在额外的第四种无菌中微子，与已知的活性味混合，相关的质量分裂Δm 2 new = 0.01 eV 2，并且对标准弱相互作用不敏感。在很短的基线（5-15米）上用强MeV ˇ ν e辐射源进行精密测量，可以用来探测这些异常。本文研究了在大型液体闪烁探测器内部或附近放置强β −放射源的一般实验的期望γ e信号和背景。进行这样的实验的技术挑战，确定，沿着量化可能的源和探测器引起的系统和它们的影响的灵敏度在短基线的中微子振荡的观察。
The standard three-neutrino oscillation paradigm, associated with small squared mass splittings Δm 2 ≪ 0.1 eV 2 , has been successfully built up over the last 15 years using solar, atmospheric, long baseline accelerator and reactor neutrino experiments. However, this well-established picture might suffer from anomalous results reported at very short baselines in some of these experiments. If not experimental artifacts, such results could possibly be interpreted as the existence of at least an additional fourth sterile neutrino species, mixing with the known active flavors with an associated mass splitting Δm 2 new ≫ 0.01 eV 2 and being insensitive to standard weak interactions. Precision measurements at very short baselines (5–15 m) with intense MeV ¯ ν e emitters can be used to probe these anomalies. In this article, the expected ¯ ν e signal and backgrounds of a generic experiment which consists of deploying an intense β − radioactive source inside or in the vicinity of a large liquid scintillator detector are studied. The technical challenges to perform such an experiment are identified, along with quantifying the possible source-and detector-induced systematics and their impact on the sensitivity to the observation of neutrino oscillations at short baselines.