标题： 相对化夸克模型中奇异轴矢介子的性质 显示英文标题

标题： Properties of the Strange Axial Mesons in the Relativized Quark Model

摘要： 我们在相对论夸克模型中研究了奇异轴矢介子的性质。 我们在夸克模型中计算了$K_1$的衰变常数，并展示了如何从弱衰变$\tau \to K_1 \nu_\tau$中提取$K_1 (^3P_1) - K_1 (^1P_1)$的混合角 ($\theta_K$)。 比值$BR(\tau \to \nu_\tau K_1 (1270))/BR(\tau\to \nu_\tau K_1(1400))$是最敏感的测量，也是最可靠的，因为最大的理论不确定性因素被消去了。 然而，从 TPC/Two-Gamma 合作组的测量中得出的当前限制相当弱：我们通常在 68% 置信水平下得到$-30^o \lesssim \theta_K \lesssim 50^o$。 我们还计算了赝标发射模型和通量管断裂模型中的强OZI允许衰变，并提取了一个$^3P_1 - ^1P_1$混合角为$\theta_K \simeq 45^o$。 我们的分析还表明，重夸克极限并不能很好地描述奇异介子。 显示英文摘要

摘要： We studied properties of the strange axial mesons in the relativized quark model. We calculated the $K_1$ decay constant in the quark model and showed how it can be used to extract the $K_1 (^3P_1) - K_1 (^1P_1)$ mixing angle ($\theta_K$) from the weak decay $\tau \to K_1 \nu_\tau$. The ratio $BR(\tau \to \nu_\tau K_1 (1270))/BR(\tau\to \nu_\tau K_1(1400))$ is the most sensitive measurement and also the most reliable since the largest of the theoretical uncertainties factor out. However the current bounds extracted from the TPC/Two-Gamma collaboration measurements are rather weak: we typically obtain $-30^o \lesssim \theta_K \lesssim 50^o$ at 68\% C.L. We also calculated the strong OZI-allowed decays in the pseudoscalar emission model and the flux-tube breaking model and extracted a $^3P_1 - ^1P_1$ mixing angle of $\theta_K \simeq 45^o$. Our analysis also indicates that the heavy quark limit does not give a good description of the strange mesons.