论文标题
在$ e^+ e^ - \ toωπ^0 $和$ e^+ e^ - \ toρη^{\ prime} $过程
Identifying the contribution of higher $ρ$ mesons around 2 GeV in the $e^+ e^- \to ωπ^0$ and $e^+ e^- \to ρη^{\prime}$ processes
论文作者
论文摘要
长期以来，光载体中的介体的特性已经很长一段时间对2.0 GEV的理解不足，这已成为扩展到较高的光载体中频谱的障碍。最近，BESIII合作发布了$ e^+ e^ - \ toωπ^0 $和$ e^+ e^ - \至ρη^{\ prime} $ 2.0 GEV上方的$ e^+ e^ - \ to的测量值，这是研究Isovector $ρ$ Meson Family的理想过程。在这项工作中，通过对上述两个过程的诞生横截面数据进行组合分析以及质谱的理论支持，以及2.0 GEV左右的$ρ$ MESON家族的生产和强烈的衰减行为，我们确定了2034 MEV在$ e e^+e^+e^to的2034 MEV附近的增强结构，从而$ e^+e^ - \ toperference $ $ e^ - \ toperference $ $ codution $ codution $ codution $ codution $ codution $ consone $ conson $ codution（ $ρ（2150）$，以及2111 MEV的另一种增强结构，以$ e^+e^ - \toρη^{\ prime} $作为$ρ（2000）$和$ρ（2150）$的贡献。这个结论意味着$ e^+e^ - \toΩπ^0 $和$ e^+e^ - \toρη^{\ prime} $是建立$ρ（1900）$和$ρ（2000）$的极好的金渠道，尤其是$ d $ - d $ - wave state $ρ（2000）的$ e^$ e^ - $ e^ - $ e^ - $ e^ - 在将来的BESIII和Belle II实验中，预计将具有更高精度的相关横截面测量值。
The properties of the light vector meson states around 2.0 GeV have been poorly understood for a long time, which has become a barrier to the expansion to higher light vector meson spectrum. Recently, the BESIII collaboration released the measurements of the $e^+ e^- \to ωπ^0$ and $e^+ e^- \to ρη^{\prime}$ reactions above 2.0 GeV, both of which are ideal processes to study the isovector $ρ$ meson family. In this work, through carrying out a combined analysis of the Born cross section data for the above two processes with the theoretical support on mass spectrum, and production and strong decay behaviors of the $ρ$ meson family around 2.0 GeV, we identify the enhancement structure near 2034 MeV observed in $e^+e^-\toωπ^0$ to be the interference contribution from two resonances $ρ(1900)$ and $ρ(2150)$, and another enhancement structure at 2111 MeV reported in $e^+e^-\toρη^{\prime}$ to be the contributions from $ρ(2000)$ and $ρ(2150)$. This conclusion means that the $e^+e^-\toωπ^0$ and $e^+e^-\toρη^{\prime}$ are the excellent golden channels to establish $ρ(1900)$ and $ρ(2000)$, especially for a $D$-wave state $ρ(2000)$, whose experimental search in the $e^+e^-$ collision should be quite challenging. The relevant cross section measurements with higher precision are expected in the future BESIII and Belle II experiments.
