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arXiv 1206.6017hep-exhep-ph
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利用大亚湾、RENO和双堆中微子实验的基线差测量有效$Δm_{31}^2$

Measurement of Effective $Δm_{31}^2$ using Baseline Differences of Daya Bay, RENO and Double Chooz Reactor Neutrino Experiments

T. J. C. Bezerra, H. Furuta, F. Suekane

摘要:

在2011年和2012年,三个反应堆中微子实验,双中微子,大亚湾和RENO显示反应堆中微子消失的积极信号,并测量混合参数sin ^2(2 th 13)分别在平均基线1.05,1.65和1.44 km。在这些实验中,有可能通过中微子能谱的畸变(振荡的E依赖性)来测量有效Dm 31 ^2。然而,由于它需要精确的能量校准,这样的测量还没有报道。Dm 31 ^2也可以通过中微子振荡的基线(L)依赖性来测量。本文从三个不同基线的反应堆实验的消失概率中测得Dm31^2为2.99^{+1.13}-1.58}(^{+0.86}-0.88})× 10^{-3} eV^2,其中误差为二维(一维)不确定度。这与在加速器实验中通过ν_μ消失测得的Dm 32^2是一致的。本文还讨论了Dm 31^2测量的重要性和未来的可能性。

英文摘要:

In 2011 and 2012, three reactor neutrino experiments, Double Chooz, Daya Bay and RENO showed positive signals of reactor neutrino disappearance and measured a mixing parameter sin^2(2th13) at average baselines 1.05, 1.65 and 1.44km, respectively. It is possible to measure effective Dm31^2 from distortion of neutrino energy spectrum (E dependence of the oscillation) in those experiments. However, since it requires a precise energy calibration, such measurements have not been reported yet. Dm31^2 can also be measured from baseline (L) dependence of the neutrino oscillation. In this paper, Dm31^2 is measured from disappearance probabilities of the three reactor experiments which have different baselines, to be 2.99^{+1.13}_{-1.58}(^{+0.86}_{-0.88}) X 10^{-3}eV^2, where the errors are two (one) dimensional uncertainties. This is consistent with Dm32^2 measured by ν_μ disappearance in accelerator experiments. Importance of Dm31^2 measurement and future possibilities are also discussed.

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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