Towards improved measurements of parity violation in atomic ytterbium

Towards improved measurements of parity violation in atomic ytterbium
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改进原子镱宇称破坏的测量

DOI:
10.1007/s10751-017-1396-8
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发表时间:
2017
影响因子:
--
通讯作者:
D. Budker
D. Budker
中科院分区:
--
文献类型:
--
作者:
D. Antypas;A. Fabricant;L. Bougas;K. Tsigutkin;D. Budker

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我们报告了在Yb中进行宇称破坏的精确测量的进展,其中在408 nm处的6s2 1S0→ 5d6s3D1光学跃迁中强弱相互作用诱导效应的理论预测已经得到证实,该效应的测量精度为± 10%。随着一个新的原子束装置提供增强的灵敏度,我们的目标是精确地确定在Yb,这将使我们能够探测不同的同位素中子的分布,研究物理超越标准模型,以及研究核内弱相互作用,通过观察的Yb核的anapole时刻与非零自旋的奇偶违反。我们提出了探测原子宇称违反的实验原理,描述了我们的新装置,并讨论了所获得的实验灵敏度以及在这些测量中表征系统学的方法。
We report on progress towards performing precision measurements of parity violation in Yb, in which the theoretical prediction for a strong weak-interaction-induced effect in the 6s2 1S0→ 5d6s3D1optical transition at 408 nm has already been confirmed, with a measurement of the effect at the ≈10 % level of accuracy. With a new atomic-beam apparatus offering enhanced sensitivity, we are aiming at precisely determining the parity violation observable in Yb, which will allow us to probe the distributions of neutrons in different isotopes, investigate physics beyond the Standard Model, as well as to study intra-nucleus weak interactions, through an observation of the anapole moment of Yb nuclei with nonzero spin. We present the experimental principle employed to probe atomic parity violation, describe our new apparatus, and discuss the attained experimental sensitivity as well as the methods for characterizing systematics in these measurements.
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