论文标题
远程平价非连接电子核子相互作用
Long-range parity non-conserving electron-nucleon interaction
论文作者
论文摘要
众所周知，核库仑磁场的电子真空极化会产生UEHLING的潜力，范围$ \ hbar/2m_e c $。同样，中微子真空极化为$ z $玻色子场产生远距离电位$ \ sim g^2/r^5 $，大范围$ \ hbar/2m_νc$。试图衡量平价一部分部分的尝试仅在该电位上产生限制，该限制比标准模型预测高几个数量级。我们表明，中微子交换潜力$ W_L（r）$的平等性不稳定（PNC）部分给出了观察到的PNC效应的很大一部分。混合$ Z-γ$电子真空极化可产生PNC电位，范围$ \ HBAR/2M_E C $，超过弱相互作用的范围五个数量级。我们计算远程PNC电位对核自旋独立和核自旋依赖性PNC效应的贡献。 对于CA，CS，CS，BA，SM，DY，HG，HG，TL，PB，BI，BI，FR，RA原子和离子和离子和离子，认为不同同位素的单异位素PNC效应和PNC效应的比率被认为是对不同同位素的效应的比率。远程PNC电位（$ \ sim $ 1 \％）的贡献显着超过了CS中PNC效应的实验误差（0.35 \％）。
As known, electron vacuum polarization by nuclear Coulomb field produces Uehling potential with the range $\hbar/2m_e c$. Similarly, neutrino vacuum polarization by $Z$ boson field produces long range potential $\sim G^2/r^5$ with the large range $\hbar/2m_νc$. Attempts to measure parity-conserving part of this potential produced only limits on this potential which are several orders of magnitude higher than the standard model predictions. We show that parity non-conserving (PNC) part of the neutrino exchange potential $W_L(r)$ gives a significant fraction of the observed PNC effects. Mixed $Z-γ$ electron vacuum polarization produces PNC potential with range $\hbar/2m_e c$, which exceeds the range of the weak interaction by five orders of magnitude. We calculate contribution of the long-range PNC potentials to the nuclear spin independent and nuclear spin dependent PNC effects. The cases of the single-isotope PNC effects and the ratio of PNC effects in different isotopes are considered for Ca, Cs, Ba, Sm, Dy, Yb, Hg, Tl, Pb, Bi, Fr, Ra atoms and ions. Contributions of the long-range PNC potentials ($\sim$1\%) significantly exceed experimental error (0.35\%) for PNC effect in Cs.
