Search for Majoron-emitting modes of Xe136 double beta decay with the complete EXO-200 dataset
Search for Majoron-emitting modes of Xe136 double beta decay with the complete EXO-200 dataset
复制标题
使用完整的 EXO-200 数据集搜索 Xe136 双 β 衰变的 Majoron 发射模式
DOI：
10.1103/physrevd.104.112002
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发表时间：
2021
影响因子：
5
通讯作者：
Cao, G. F.
中科院分区：
文献类型：
--
作者：
Al Kharusi, S.;Anton, G.;Badhrees, I.;Barbeau, P. S.;Beck, D.;Belov, V.;Bhatta, T.;Breidenbach, M.;Brunner, T.;Cao, G. F.
使用完整的 EXO-200 数据集搜索无中微子双 β 衰变的主子发射模式。该数据集由总暴露组成，并包含检测器升级后的数据，相对于之前的搜索，能量阈值有所提高。下限为 90% C.L.获得了光谱指数半衰期的Majoron衰减，比EXO-200之前的限制严格3.6倍，比KamLAND-Zen之前的最佳限制严格1.6倍。该限制对应于马约子-中微子耦合常数的约束。与之前的 EXO-200 搜索相比，较低的阈值和获取的额外数据使该模式提高了 8.4 倍。这项搜索提供了迄今为止对光谱指数为 2、3 和 7 的马约隆发射衰变的最严格限制。
A search for Majoron-emitting modes of the neutrinoless double beta decay ofis performed with the full EXO-200 dataset. This dataset consists of a totalexposure of, and includes data with detector upgrades that have improved the energy threshold relative to previous searches. A lower limit ofat 90% C.L. on the half-life of the spectral indexMajoron decay was obtained, a factor of 3.6 more stringent than the previous limit from EXO-200 and a factor of 1.6 more stringent than the previous best limit from KamLAND-Zen. This limit corresponds to a constraint on the Majoron-neutrino coupling constant of. The lower threshold and the additional data taken resulted in a factor 8.4 improvement for themode compared to the previous EXO-200 search. This search provides the most stringent limits to date on the Majoron-emitting decays ofwith spectral indices, 2, 3, and 7.