Search for the Neutron Decay n→X+γ , Where X is a Dark Matter Particle
Search for the Neutron Decay n→X+γ , Where X is a Dark Matter Particle
复制标题
搜索中子衰变 n−X γ ，其中 X 是暗物质粒子
DOI：
10.1103/physrevlett.121.022505
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发表时间：
2018
影响因子：
8.6
通讯作者：
Geltenbort, P.
中科院分区：
文献类型：
--
作者：
Tang, Z.;Blatnik, M.;Broussard, L. J.;Choi, J. H.;Clayton, S. M.;Cude-Woods, C.;Currie, S.;Fellers, D. E.;Fries, E. M.;Geltenbort, P.
Fornal和Grinstein最近提出，两种不同的中子寿命测量方法（束法和瓶法）之间的差异可以用以前未观察到的暗物质衰变模式来解释。我们进行了搜索，在允许的范围内的能量的monoenergeticray的这种衰变模式是暗物质。康普顿抑制高纯度锗探测器用于识别镍磷涂层不锈钢瓶中的中子衰变射线。蒙特卡罗和放射源校准的组合被用来确定探测暗物质衰变模式产生的射线的绝对效率。我们排除了一个足够强大的分支解释寿命差异的可能性，置信度为97%。
Fornal and Grinstein recently proposed that the discrepancy between two different methods of neutron lifetime measurements, the beam and bottle methods, can be explained by a previously unobserved dark matter decay mode,. We perform a search for this decay mode over the allowed range of energies of the monoenergeticray forto be dark matter. A Compton-suppressed high-purity germanium detector is used to identifyrays from neutron decay in a nickel-phosphorous-coated stainless-steel bottle. A combination of Monte Carlo and radioactive source calibrations is used to determine the absolute efficiency for detectingrays arising from the dark matter decay mode. We exclude the possibility of a sufficiently strong branch to explain the lifetime discrepancy with 97% confidence.