论文标题
改进了魅力和底部夸克EDM的间接限制
Improved indirect limits on charm and bottom quark EDMs
论文作者
论文摘要
我们从顺磁AMO和中子EDM实验的魅力和底部夸克电偶极矩（EDM）中获得间接极限。魅力和底部夸克Edms生成$ CP $ -ODD Photon-Gluon操作员和Light Quark Edms，以$ C $ - 和$ b $ QUARK-QUARK MASS THERHOLDS。这些$ CP $ -ODD操作员分别诱导$ CP $ -ODD半副操作员$ C_S $和低于QCD量表的中子EDM，分别由promagnetic和Neutron EDM实验探测。 The bound from $C_S$ is $\vert d_c \vert < 1.3\times 10^{-20}\,e\,\mathrm{cm}$ for the charm quark and $\vert d_b \vert < 7.6\times 10^{-19}\,e\,\mathrm{cm}$ for the bottom quark, with its uncertainty估计为10％。中子EDM提供了更强的界限，$ \ vert d_c \ vert <6 \ times 10^{ - 22} \，e \，\ mathrm {cm} $和$ \ vert d_b \ vert d_b \ vert <2 \ vert <2 \ times 10^{-20}}}}} \，e \，e \，e \，\，\，\，\ m rmm {
We derive indirect limits on the charm and bottom quark electric dipole moments (EDMs) from paramagnetic AMO and neutron EDM experiments. The charm and bottom quark EDMs generate $CP$-odd photon-gluon operators and light quark EDMs at the $c$- and $b$-quark mass thresholds. These $CP$-odd operators induce the $CP$-odd semi-leptonic operator $C_S$ and the neutron EDM below the QCD scale that are probed by the paramagnetic and neutron EDM experiments, respectively. The bound from $C_S$ is $\vert d_c \vert < 1.3\times 10^{-20}\,e\,\mathrm{cm}$ for the charm quark and $\vert d_b \vert < 7.6\times 10^{-19}\,e\,\mathrm{cm}$ for the bottom quark, with its uncertainty estimated as 10%. The neutron EDM provides a stronger bound, $\vert d_c \vert < 6\times 10^{-22}\,e\,\mathrm{cm}$ and $\vert d_b \vert < 2\times 10^{-20}\,e\,\mathrm{cm}$, though with a larger hadronic uncertainty.
