论文标题
分析具有夸克和强子自由度的耦合通道电位
Analysis of coupled-channel potentials with quark and hadron degrees of freedom
论文作者
论文摘要
众所周知，在没有$ \ bar {q} q $对创建的情况下，Quark-Antiquark电位限制。另一方面，由于相互作用范围受到反向脉冲质量的限制，因此射频的电势在较大距离上消失。当$ \ bar {q} q $对创建和歼灭打开时，通道耦合发生在夸克和强子自由度之间，从而改变了电势行为。在这项工作中，我们通过消除其中一个通道来研究获得的有效电位的性能。我们表明，与消除通道的耦合诱导非本地和能量依赖性有效潜力，而与过渡势的性质无关。另外，当消除具有连续散射本征态的强子通道时，产生的Quark电势包含在阈值上方的假想部分，以将衰减效果描述为介子对。
The quark-antiquark potentials are known to be confining in the absence of the $\bar{q}q$ pair creation. On the other hand, the inter-hadron potentials vanish at large distance, because the interaction range is limited by the inverse pion mass. When the $\bar{q}q$ pair creation and annihilation are switched on, the channel coupling occurs between the quark and hadron degrees of freedom, modifying the behavior of potentials. In this work, we investigate the properties of the effective potentials obtained by eliminating one of the channels. We show that the coupling to the eliminated channel induces a non-local and energy dependent effective potential, irrespective of the properties of the transition potential. In addition, when the hadron channel having continuous scattering eigenstates is eliminated, the resulting inter-quark potential contains an imaginary part above the threshold to describe the decay effect into the meson pair.
