Constraints on the Dark Matter Interpretation n→χ+e^{+}e^{-} of the Neutron Decay Anomaly with the PERKEO II Experiment.

Constraints on the Dark Matter Interpretation n→χ+e^{+}e^{-} of the Neutron Decay Anomaly with the PERKEO II Experiment.
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PERKEO II 实验对中子衰变异常暗物质解释 n→χ+e^{+}e^{-} 的约束。

DOI:
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发表时间:
2019
影响因子:
8.6
通讯作者:
Hartmut Abele
Hartmut Abele
中科院分区:
物理与天体物理1区
文献类型:
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作者:
Michael Klopf;E. Jericha;B. Märkisch;H. Saul;H. Saul;Torsten Soldner;Hartmut Abele

文献摘要

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束内式和瓶内式实验测量中子寿命的误差在4σ的标准偏差水平上。在最近的一篇论文中,弗纳尔和格林斯坦提出,如果中子通过暗衰变模式以百分之一的水平衰减,这个谜题就可以解决,其中一个可能的分支是n→χ+e^{+}e^{-}。根据Perkeo II实验的数据,我们设置了分支分数的限制,并排除了暗物质粒子允许质量范围的95%的1%的贡献。
Discrepancies from in-beam- and in-bottle-type experiments measuring the neutron lifetime are on the 4σ standard deviation level. In a recent publication Fornal and Grinstein proposed that the puzzle could be solved if the neutron would decay on the one percent level via a dark decay mode, one possible branch being n→χ+e^{+}e^{-}. With data from the Perkeo II experiment we set limits on the branching fraction and exclude a one percent contribution for 95% of the allowed mass range for the dark matter particle.