Abstract Tests of the standard model of particle physics should be carried out over the widest possible range of energies. Here we present our plans and progress for an atomic parity non-conservation experiment using the heaviest alkali, francium (Z = 87), which has no stable isotope. Low-energy tests of this kind have sensitivity complementary to higher energy searches, e.g. at the large hadron collider.

中文翻译：

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原子系统中弱相互作用的研究：对钫中原子宇称不守恒的测量

摘要 粒子物理标准模型的测试应该在尽可能广泛的能量范围内进行。在这里，我们介绍了使用没有稳定同位素的最重碱钫 (Z = 87) 进行原子宇称非守恒实验的计划和进展。这种低能量测试具有与更高能量搜索互补的灵敏度，例如在大型强子对撞机上。