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arXiv 1002.3349hep-ph
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超新星电子反中微子发射标准情景中的中微子质量束缚

Neutrino mass bound in the standard scenario for supernova electronic antineutrino emission

Giulia Pagliaroli, Fernando Rossi-Torres, Francesco Vissani

摘要:

基于最近对超新星电子反中微子发射模型的改进,我们更新了由Kamiokande-II,IMB和Baksan收集的SN 1987 A数据的中微子质量极限。我们推导出在95%CL下的5.8 eV的极限,我们表明对天体物理不确定性非常不敏感。此外,我们评估这种方法的最终质量灵敏度的检测器,如超级神冈。我们发现,绑定位于sub-eV区域,0.8 eV在95%CL是一个典型的结果,与目前在实验室探测的值竞争。然而,这一界限受到强烈的统计波动,与最初检测到的几个事件的特征相关。我们简要评论未来探测器提供的前景。

英文摘要:

Based on recent improvements of the supernova electron antineutrino emission model, we update the limit on neutrino mass from the SN1987A data collected by Kamiokande-II, IMB and Baksan. We derive the limit of 5.8 eV at 95 % CL, that we show to be remarkably insensitive to the astrophysical uncertainties. Also we evaluate the ultimate mass sensitivity of this method for a detector like Super-Kamiokande. We find that the bound lies in the sub-eV region, 0.8 eV at 95 % CL being a typical outcome, competitive with the values that are presently probed in laboratory. However, this bound is subject to strong statistical fluctuations, correlated to the characteristics of the first few events detected. We briefly comment on the prospects offered by future detectors.

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