论文标题
看镜子：$^$ -Asymmetry in $^{19} $ ne衰减的测量
A look into mirrors: A measurement of the $β$-asymmetry in $^{19}$Ne decay and searches for new physics
论文作者
论文摘要
等素的高精度测量值$ t = 1/2 $衰减在中子和核中为对粒子物理标准模型的扩展提供了强大的模型无关的约束。提出了对$β$ - 美体在$^{19} $ ne衰减之间的测量，并提出了发射正电子的方向之间的衰减，这确立了最精确的核镜，并确定了Fermi-Ot-Gamow-teller的混合比率，并将其混合比率固定至$ρ= 1.6014（+214（+21/21/ - 28）$} {8）{8）{8）{8）这与以前的最精确的测量相一致，它产生了CKM Unitarity参数$ v_ {ud} $的价值，与核镜，中子和超级抑制$β$ -Decay数据集一致，没有显示二级潮流的证据，并且可以有效地将Neuton decay数据与exate decay数据限制，使型数据限制在explotic coupling couplings couplings couplings coupling couplings cou couyples coun.complect。
High precision measurements of isospin $T=1/2$ decays in the neutron and nuclei provide strong model-independent constraints on extensions to the standard model of particle physics. A measurement of the $β$-asymmetry in $^{19}$Ne decay between the initial nuclear spin and the direction of the emitted positron is presented which establishes this decay as the most precisely characterized nuclear mirror and fixes the Fermi-to-Gamow-Teller mixing ratio to $ρ= 1.6014(+21/-28)_{sys}(8)_{stat}$. This is consistent with the previous, most precise measurement, produces a value of the CKM unitarity parameter $V_{ud}$ in agreement with the nuclear mirror, neutron and superallowed $β$-decay data sets, shows no evidence for second class currents, and can be effectively used with neutron decay data to place a limits on exotic tensor couplings.
