论文标题
h $^3δ_1$辐射寿命的测量
Measurement of the H$^3Δ_1$ Radiative Lifetime in ThO
论文作者
论文摘要
电子电动偶极矩（EEDM）的最佳极限来自ACME II实验[Nature \ TextBf {562}（2018），355-360]，该实验在能量尺度上探测了超出标准模型的物理，远高于1 TEV。 ACME II通过监测亚稳态H $^3δ_1$一氧化衣（THO）分子状态的冷光束中的电子自旋进液测量了EEDM，每个分子的观察时间$τ\ \τ\约1 $ ms。我们在这里报告了对THO（H $^3δ_1$）状态的生命周期的新测量，$τ_H= 4.2 \ pm 0.5 $ ms。使用$τ\τ_h$的设备将大大降低EEDM测量的不确定性。
The best limit on the electron electric dipole moment (eEDM) comes from the ACME II experiment [Nature \textbf{562} (2018), 355-360] which probes physics beyond the Standard Model at energy scales well above 1 TeV. ACME II measured the eEDM by monitoring electron spin precession in a cold beam of the metastable H$^3Δ_1$ state of thorium monoxide (ThO) molecules, with an observation time $τ\approx 1$ ms for each molecule. We report here a new measurement of the lifetime of the ThO (H$^3Δ_1$) state, $τ_H = 4.2\pm 0.5$ ms. Using an apparatus within which $τ\approx τ_H$ will enable a substantial reduction in uncertainty of an eEDM measurement.
