标题： 区分强衰变模型 显示英文标题

标题： Distinguishing Among Strong Decay Models

摘要： 两种用于强强子衰变的竞争性模型，即$^3P_0$模型和$^3S_1$模型，目前正在使用中。 试图排除其中一种模型的努力受到了对末态相互作用理解不足以及相对论效应处理中的模糊性所阻碍。 在本文中，我们研究了两种模型中的介子衰变，重点关注某些振幅比值，这些比值中的相对论不确定性很大程度上相互抵消（特别是$S/D$比值在$b_1\rightarrow\pi\omega$和$a_1\rightarrow\pi\rho$中），并使用夸克初态形式来估计末态相互作用。 我们发现$^3P_0$模型被强烈支持。 此外，我们预测衰变 $\pi_2\rightarrow\pi\rho$的 $P/F$幅度比为 $1.6\pm .2$。 我们还研究了一些单独幅度（而不是幅度比）的参数依赖性，以尝试确定“最佳”的 $^3P_0$模型。 显示英文摘要

摘要： Two competing models for strong hadronic decays, the $^3P_0$ and $^3S_1$ models, are currently in use. Attempts to rule out one or the other have been hindered by a poor understanding of final state interactions and by ambiguities in the treatment of relativistic effects. In this article we study meson decays in both models, focussing on certain amplitude ratios for which the relativistic uncertainties largely cancel out (notably the $S/D$ ratios in $b_1\rightarrow\pi\omega$ and $a_1\rightarrow\pi\rho$), and using a Quark Born Formalism to estimate the final state interactions. We find that the $^3P_0$ model is strongly favoured. In addition, we predict a $P/F$ amplitude ratio of $1.6\pm .2$ for the decay $\pi_2\rightarrow\pi\rho$. We also study the parameter-dependence of some individual amplitudes (as opposed to amplitude ratios), in an attempt to identify a ``best'' version of the $^3P_0$ model.