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.
复制标题
PERKEO II 实验对中子衰变异常暗物质解释 n→χ+e^{+}e^{-} 的约束。
DOI:
--
复制
发表时间:
2019
影响因子:
8.6
通讯作者:
Hartmut Abele
中科院分区:
文献类型:
--
作者:
Michael Klopf;E. Jericha;B. Märkisch;H. Saul;H. Saul;Torsten Soldner;Hartmut Abele
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.