论文标题
在$ x（4260）$的Leptonic宽度上
On leptonic width of $X(4260)$
论文作者
论文摘要
$ e^+e^ - \至j/ψπ^+π^ - $，$h_cπ^+π^ - $，$ d^0d^0d^{* - }π^++ c.c. $，$h_cπ^+π^ - $，$h_cπ^+c.c. $，$h_cπ^+π^ - $，$ c.c. Belle和Babar的合作，以及$ d_s^*\ bar d_s^*$ channel中。我们通过组合所有这些可用数据以及$ d \ bar d^*$和$ d^*\ bar d^*$ channel中的所有这些数据来执行广泛的数值分析。尽管后者在$ \ sqrt {s} = 4.230 $ gev上没有明显的峰值，但丢失的$ x（4260）$被解释为被认为是由已建立的Charmonia $ chonmonia $ψ（4040）$，$ψ（4160）$ψ（4160）和$ψ（4415）的干扰效应所隐藏的。我们的分析表明，$ x（4260）$范围从$ o（10^2）$ eV到$ o（1）$ kev的衰减宽度范围，因此可以在传统的夸克模型图片中进行说明。也就是说，$ x（4260）$很可能被解释为$ 4^3S_1 $和$ 3^3D_1 $状态的混合物。
New measurements on cross sections in $e^+e^-\to J/ψπ^+π^-$, $h_cπ^+π^-$, $D^0D^{*-}π^++c.c.$, $ψ(2S)π^+π^-$, $ωχ_{c0}$ and $J/ψη$ channels have been carried out by BESIII, Belle and BABAR collaborations, and also in the $D_s^*\bar D_s^*$ channel. We perform extensive numerical analyses by combining all these data available, together with those in $D\bar D^*$ and $D^*\bar D^*$ channels. Though the latter show no evident peak around $\sqrt{s}=4.230$ GeV, the missing $X(4260)$ is explained as that it is concealed by the interference effects of the well established charmonia $ψ(4040)$, $ψ(4160)$ and $ψ(4415)$. Our analyses reveal that the leptonic decay width of $X(4260)$ ranges from $O(10^2)$ eV to $O(1)$ keV, and hence may be explained in the conventional quark model picture. That is, the $X(4260)$ may well be interpreted as a mixture of $4^3S_1$ and $3^3D_1$ states.
