论文标题
从$^8 $ li $β$衰减的弱相互作用中张量电流的限制提高了
Improved Limit on Tensor Currents in the Weak Interaction from $^8$Li $β$ Decay
论文作者
论文摘要
标准模型（SM）中的电子相互作用用纯矢量 - 轴矢量结构来描述，尽管任何Lorentz-Invariant组件都可以贡献。在这项工作中，我们通过检查$β$ - $ \barν$与beta-decay paul trap的$β$ - $ \barν$相关性，介绍了低能策略中对张量电流的最精确测量。我们发现$ a_ {βν} = -0.3325 \ pm 0.0013_ {stat} \ pm 0.0019_ {syst} $ at $1σ$，用于耦合到右手中微子$（C_T = -C_T'）$，这与SM预测一致。
The electroweak interaction in the Standard Model (SM) is described by a pure vector-axial-vector structure, though any Lorentz-invariant component could contribute. In this work, we present the most precise measurement of tensor currents in the low-energy regime by examining the $β$-$\barν$ correlation of trapped $^{8}$Li ions with the Beta-decay Paul Trap. We find $a_{βν} = -0.3325 \pm 0.0013_{stat} \pm 0.0019_{syst}$ at $1σ$ for the case of coupling to right-handed neutrinos $(C_T=-C_T')$, which is consistent with the SM prediction.
