标题： 带电π介子不对称性来自轻中性轴向介子衰变的干涉效应 显示英文标题

标题： Charged pions asymmetry from the decay of light neutral axial mesons due to interference

摘要： 基于味 U(3) 夸克-反夸克相互作用的有效三介子耦合被用来描述两个轻中性轴矢介子强衰变，$A \sim f_1(1285)$和$f_{1S} (1420)$，以及带电 rho 介子在以下通道中的衰变：$A \to \rho^\mp (770)+ \pi^\pm$、$A\to a_0^\mp (980) +\pi^\pm$和$\rho^\pm \to \pi^\pm \pi^0$。 通过考虑中性介子混合，例如对于所研究的通道中的 $f_1(1285) - a_1^0(1260)$、$f_{1S}(1420) - a_1^0(1260)$ 和 $\eta-\pi^0$，领先的三介子相互作用可能会导致衰变振幅发生干涉，并且产生一个衰变率比值，进入带电π介子的 $\Gamma_{\pi^+}/\Gamma_{\pi^-}$，略小于1。 为了这个目的，假设产生的带电矢量介子或带电标量介子经历吸收、衰变为不含带电π介子的通道，或者任何其他可能抑制它们衰变为带电π介子的非弹性过程。 显示英文摘要

摘要： Effective three meson couplings, based in flavor U(3) quark-antiquark interactions, are considered to describe two light neutral axial meson Strong decays, $A \sim f_1(1285)$ and $f_{1S} (1420)$, and the charged rho meson decay in the following channels: $A \to \rho^\mp (770)+ \pi^\pm$, $A\to a_0^\mp (980) +\pi^\pm$ and $\rho^\pm \to \pi^\pm \pi^0$. By considering neutral meson mixings, such as $f_1(1285) - a_1^0(1260)$, $f_{1S}(1420) - a_1^0(1260)$ and $\eta-\pi^0$ for the channels investigated, the leading three-meson interactions may lead to decay amplitudes that undergo interference and a resulting ratio of decay rate into charged pions, $\Gamma_{\pi^+}/\Gamma_{\pi^-}$, slightly smaller than one. For that it will be assumed that the produced charged vector mesons or charged scalar mesons undergo absorption, decay into channels without charged pions, or any other inelastic process that may suppress their decays into charged pions.