论文标题
$ y $的状态大约是$ e^+e^ - $ nihihitation高charmonia的4.6 GEV吗？
Are the $Y$ states around 4.6 GeV from $e^+e^-$ annihilation higher charmonia?
论文作者
论文摘要
在这项工作中，我们通过采用无震动的潜在模型来介绍周围和高于4.6 GEV的高级charomona的质谱。我们对$ e^+e^ - \toψ（2s）π^+π^ - $和$ e^+e^ - \toλ_c\barλ_c$的更新的实验数据进行了组合拟合。要了解$ 4.57 \ sim 4.60 $ gev在$λ_c\barλ_c$ gev范围内观察到的“平台”结构，$ e^+e^+e^+e^ - \ toλ_c\barλ_c$不变的质谱是besiii的，我们对$ e^+e^+e^+e^ - ^ - ^ - ^ - ^ - ^ - ^+E^ - 2; $ e^+e^ - \至λ_c\barλ_c$，具有共振参数，$ m_ {y_1} = 4585 \ pm2 $ meV，$γ_{y_1} = 29.8 \ pm8.0 $ meV，$ mev，$ m__2} = 4676 = 4676 \ pm7 $ MEV，＆＆mev ,, $γ_{y_2} = 85.7 \ PM15.0 $ MEV。此外，结合我们的理论结果，我们表明这两个类似charmonium的$ y $状态可能是由于两个较高的charmonia造成的，它们的混合物为$ 6s $和$ 5D $ $ $ c \ bar {c} $ state。给出了他们的两体开放性衰变行为。在同一框架下，我们对$ e^+e^ - \数据的数据分析到d_ {s}^+d_ {s1}（2536）^ - $最近发布的Belle Suppland Suppland Suppland Supports在4.6 GEV上引入了这两个较高的Charmonia。此外，我们预测质量和两体开放式衰减将为六个高的Charmonia $ψ（NS）$和$ψ（MD）$，$ n = 7,8,9 $，$ m = 6,7,7 $高于4.6 GEV。对于跑步的Besiii和Belleii，甚至在中国讨论的超级Tau-Charm工厂，搜索这些更高的Charmonia将是一个有趣的问题。
In this work, we present the mass spectrum of higher charomona around and above 4.6 GeV by adopting the unquenched potential model. We perform a combined fit to the updated experimental data of $e^+e^- \to ψ(2S)π^+π^-$ and $e^+e^-\to Λ_c\barΛ_c$. To understand the "platform" structure observed in the range of $4.57 \sim 4.60$ GeV existing in the $Λ_c\barΛ_c$ invariant mass spectrum of $e^+e^-\to Λ_c\barΛ_c$ of BESIII, we introduce two resonances in this combined fit to the $e^+e^- \to ψ(2S)π^+π^-$ and $e^+e^-\to Λ_c\barΛ_c$, which have resonance parameters, $m_{Y_1}=4585\pm2$ MeV, $Γ_{Y_1}=29.8\pm8.0$ MeV, $m_{Y_2}=4676\pm7$ MeV, and $Γ_{Y_2}=85.7\pm15.0$ MeV. Furthermore, combining with our theoretical results, we indicate that the two charmonium-like $Y$ states can be due to two higher charmonia, which are mixtures of $6S$ and $5D$ $c\bar{c}$ states. Their two-body open-charm decay behaviors are given. Under the same framework, our analysis of the data of $e^+e^-\to D_{s}^+D_{s1}(2536)^-$ recently released by Belle supports to introduce these two higher charmonia around 4.6 GeV. Additionally, we predict the masses and two-body open-charm decays of six higher charmonia $ψ(nS)$ and $ψ(mD)$ with $n=7,8,9$ and $m=6,7,8$ above 4.6 GeV. Search for these higher charmonia will be an interesting issue for the running BESIII and BelleII, and even the possible Super Tau-Charm Factory discussed in China.
