Improved Limits on Axionlike-Particle-Mediated P, T-Violating Interactions between Electrons and Nucleons from Electric Dipole Moments of Atoms and Molecules.
Improved Limits on Axionlike-Particle-Mediated P, T-Violating Interactions between Electrons and Nucleons from Electric Dipole Moments of Atoms and Molecules.
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DOI：
10.1103/physrevlett.120.013202
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发表时间：
2017-08
影响因子：
8.6
通讯作者：
Y. Stadnik;V. Dzuba;V. Flambaum
中科院分区：
文献类型：
--
作者：
Y. Stadnik;V. Dzuba;V. Flambaum
在P，T破坏相互作用存在的情况下，原子和分子中的电子和核子之间的轴离子状粒子交换产生原子和分子的电偶极矩(EDM)。我们用相对论Hartree-Fock-Dirac方法计算了这种轴子交换诱导的原子EDM，其中包含了电子核心的极化修正。我们给出了解析的估计来解释这些诱导的原子内模与轴子质量和原子参数的依赖关系。从原子和分子的电子能谱的实验范围，包括^{133}Cs，^{205}Tl，^{129}Xe，^{199}Hg，^{171}Yb^{19}F，^{180}Hf^{19}F^^{232}Th^{16}，我们约束了任意质量的类轴离子粒子所介导的违反P，T的标量赝标量核子-电子相互作用。对于m_(A)≳10^(-2)eV，我们的极限比其他实验的现有实验室极限提高了许多数量级。我们还对某些类型的松弛模型中的CP破坏施加了约束。
In the presence of P, T-violating interactions, the exchange of axionlike particles between electrons and nucleons in atoms and molecules induces electric dipole moments (EDMs) of atoms and molecules. We perform calculations of such axion-exchange-induced atomic EDMs using the relativistic Hartree-Fock-Dirac method including electron core polarization corrections. We present analytical estimates to explain the dependence of these induced atomic EDMs on the axion mass and atomic parameters. From the experimental bounds on the EDMs of atoms and molecules, including ^{133}Cs, ^{205}Tl, ^{129}Xe, ^{199}Hg, ^{171}Yb^{19}F, ^{180}Hf^{19}F^{+}, and ^{232}Th^{16}O, we constrain the P, T-violating scalar-pseudoscalar nucleon-electron and electron-electron interactions mediated by a generic axionlike particle of arbitrary mass. Our limits improve on existing laboratory bounds from other experiments by many orders of magnitude for m_{a}≳10^{-2} eV. We also place constraints on CP violation in certain types of relaxion models.