Comment on Phys. Rev. Lett. 108, 191802 (2012): "Observation of Reactor Electron Antineutrino Disappearance in the RENO Experiment"

Comment on Phys. Rev. Lett. 108, 191802 (2012): "Observation of Reactor Electron Antineutrino Disappearance in the RENO Experiment"
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发表时间:
2012-05
期刊:
arXiv: High Energy Physics - Experiment
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通讯作者:
T. Lasserre;G. Mention;M. Cribier;A. Collin;V. Durand;V. Fischer;J. Gaffiot;D. Lhuillier;A. Letourneau;M. Vivier
T. Lasserre;G. Mention;M. Cribier;A. Collin;V. Durand;V. Fischer;J. Gaffiot;D. Lhuillier;A. Letourneau;M. Vivier
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作者:
T. Lasserre;G. Mention;M. Cribier;A. Collin;V. Durand;V. Fischer;J. Gaffiot;D. Lhuillier;A. Letourneau;M. Vivier

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RENO实验最近报道了与中微子振荡一致的反应堆电子反中微子的消失,显著性为4.9个标准差。已公布的远端探测器中观测到的反中微子数与预期的反中微子数之比R=0.920 +-0.009(stat.)。+-0.014(系统),对应于sin^2 ^ theta13 = 0.113 +-0.013(stat.)+-0.019(系统),使用仅率分析。在这封信中,我们重新分析数据,我们发现比值R=0.903 +-0.01(stat.),导致sin^2 ^ theta13 = 0.135。此外,我们还证明了sin^2 ^ theta13的测量仍然依赖于超过4 MeV的提示高能界,这与基于中微子振荡的期望相反。
The RENO experiment recently reported the disappearance of reactor electron antineutrinos consistent with neutrino oscillations, with a significance of 4.9 standard deviations. The published ratio of observed to expected number of antineutrinos in the far detector is R=0.920 +-0.009(stat.) +-0.014(syst.) and corresponds to sin^2 2theta13 = 0.113 +-0.013(stat.) +-0.019(syst), using a rate-only analysis. In this letter we reanalyze the data and we find a ratio R=0.903 +-0.01(stat.), leading to sin^2 2theta13 = 0.135. Moreover we show that the sin^2 2theta13 measurement still depend of the prompt high energy bound beyond 4 MeV, contrarily to the expectation based on neutrino oscillation.