论文标题
估计SM中已知机制的CP违反EDM
Estimation of CP violating EDMs from known mechanisms in the SM
论文作者
论文摘要
除标准模型（SM）中已知来源以外，需要新的CP违规来源来解释宇宙的Baryon不对称性。测量非零的永久性偶极矩（EDM）的基本颗粒，例如在电子或中子中，或原子核或原子中，可以帮助我们在SM及以后的CP违规源方面获得措施。 SM中的多种机制可以通过弱部门的CKM矩阵或通过QCD $ \ \barθ$参数在强部门中生成CP违反EDM。我们将估计（CKM $ \ bigoplus \barθ$）框架中的乳子，某些重子和分子的最大可能EDM，假设EDM独立地源自两个SM机制中的任何一个。这些估计已根据EDM的当前实验上限提出，在以下系统中 - Leptons：$ e^ - $，$μ^ - $，$τ^ - $，$，$ν_e^0 $，$ν^0_μ$，$ν^0_μ$，$ v $，baryons：$ n^0 $，$ p^+$，$，$，$，$，$，$，$，$，$，$，$，$，$，$，，$λ $λ^+_ c $，$ξ^+_ c $，aroms：$^{85} $ rb，$^{133} $ cs，$^{210} $ fr，$^{205} $ tl，$ tl，$^{199} $^{199} $ hg，$ hg，$ hg，$^{129} $ xe {129} $ xe，$ xe，$ xe，$ xe，$ xe，$ xe，$ XE，$ x 225}分子：HFF $^+$，PBO，YBF，THO，RAF，TLF。特别是，要使不同系统中的EDM限制CP侵入性交互的观点不同，我们表明，在两个不同系统中，对EDM的相同限制实际上可能并不同样受到违反CP违反参数的约束，并强调需要在了解这些CP-giolated EDM的原始系统之前测量多个系统中的非零EDM。
New sources of CP violation, beyond the known sources in the standard model (SM), are required to explain the baryon asymmetry of the universe. Measurement of a non-zero permanent electric dipole moment (EDM) for fundamental particles, such as in an electron or a neutron, or in nuclei or atoms, can help us gain a handle on the sources of CP violation, both in SM and beyond. Multiple mechanisms within the SM can generate CP violating EDMs, viz.\ through the CKM matrix in the weak sector or through the QCD $\barθ$ parameter in the strong sector. We will estimate the maximum possible EDMs of leptons, certain baryons, select atoms and molecules in the (CKM$\bigoplus\barθ$) framework, assuming that the EDM wholly originates from either of the two SM mechanisms, independently. These estimates have been presented in light of the current experimental upper limits on the EDMs, in the following systems - leptons: $e^-$, $μ^-$, $τ^-$, $ν_e^0$, $ν^0_μ$, $ν^0_τ$, baryons: $n^0$, $p^+$, $Λ^0$, $Σ^0$, $Ξ^0$, $Λ^+_c$, $Ξ^+_c$, atoms: $^{85}$Rb, $^{133}$Cs, $^{210}$Fr, $^{205}$Tl, $^{199}$Hg, $^{129}$Xe, $^{225}$Ra, $^{223}$Rn, and molecules: HfF$^+$, PbO, YbF, ThO, RaF, TlF. Particularly, to drive home the point that EDMs in different systems constrain CP-violating interactions differently, we show that the same measured constraint on the EDM in two different systems may not actually be equally constraining on CP violating parameters, and to emphasize the need to measure a non-zero EDM in multiple systems before understanding the origins of these CP-violating EDMs.
