论文标题
$ y（4260）$作为四夸克州
$Y(4260)$ as four-quark state
论文作者
论文摘要
我们将$ y（4260）$共振视为在协变量限制夸克模型框架内的四夸克州。我们研究插值电流的两种选择，即分子型电流，它们有效地对应于$ d $和$ \ bar d_1 $ Quark Currents或Tetraquark One的乘积。在这两种情况下，我们计算衰减的宽度$ y（4260）\ to z_c（3900）+π$和$ y（4260）\ to d^{（\ ast）}+\ bar d^{（\ ast）} $。发现在两者中，与开放式魅力模式相比，在批准模式$ y \ to z^ + _ c +π^ - $。但是，在分子图片中获得的$ y \至z^ + _ c +π^ - $ n衰变宽度的绝对值可以说太大了。另一方面，在Tetraquark图片中获得的值是合理的。
We treat the $Y(4260)$ resonance as a four-quark state in the framework of the covariant confining quark model. We study two choices of the interpolating current, either the molecular-type current which effectively corresponds to the product of $D$ and $\bar D_1$ quark currents or tetraquark one. In both cases we calculate the widths of decays $Y(4260)\to Z_c(3900)+π$ and $Y(4260)\to D^{(\ast)}+\bar D^{(\ast)}$. It is found that in both approches the mode $Y\to Z^+_c + π^-$ is enhanced compared with the open charm modes. However the absolute value of the $Y\to Z^+_c + π^-$ decay width obtained in molecular picture is arguably too large. On the other hand the value obtained in tetraquark picture is reasonable.
