论文标题
部分可观测时空混沌系统的无模型预测
$β$-nuclear-recoil correlation from $^6$He decay in a laser trap
论文作者
论文摘要
我们报告了从放射性贵重气体（$^6 {\ rm He} $）通过磁磁陷阱限制的$β$ - recoil相关性的第一个精确测量。该测量是通过寻找对带电弱电流的异国情调张量构成的贡献来激发的。被解释为具有右手中微子的张量电流，测量结果得出：$ | c_t/c_a |^2 \ le 0.022 $（90 \％c.l.）。另一方面，对于左手中微子，限制为$ 0.007 <c_t/c_a <0.111 $〜（90 \％\ c.l.）。当前测量的灵敏度主要受到实验不确定性在确定时间响应特性以及原子云与用于后退离子检测的微通道板之间的距离时的限制。
We report the first precise measurement of a $β$-recoil correlation from a radioactive noble gas ($^6{\rm He}$) confined via a magneto-optical trap. The measurement is motivated by the search for exotic tensor-type contributions to the charged weak current. Interpreted as tensor currents with right-handed neutrinos, the measurements yield: $|C_T/C_A|^2\le 0.022$ (90\% C.L.). On the other hand, for left-handed neutrinos the limits are $0.007< C_T/C_A <0.111$~(90\%\ C.L.). The sensitivity of the present measurement is mainly limited by experimental uncertainties in determining the time response properties and the distance between the atom cloud and the micro-channel plate used for recoil ion detection.
