arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0708.4167hep-phhep-exnucl-exnucl-th
收藏

理解Belle新观察到的Y(4008)

Understanding the newly observed Y(4008) by Belle

Xiang Liu

摘要:

最近,Belle实验观察到4.05 GeV附近的新增强。在这篇短文中,我们讨论了这种增强的一些可能的分配,即$ψ(3S)$和$D^*\bar{D}^*$分子状态。在这两个指定中,Y(4008)可以衰变为$J/ψπ^0π^0$,其分支比与$Y(4008)\to J/ψπ^+π^-$相当。因此建议高能实验工作者在$J/ψπ^0π^0$通道中寻找Y(4008)。此外,提出了进一步的实验来搜索丢失的通道$D\bar{D}$、$D\bar{D}^*+h.c.$,特别是$χ_{cJ}π^+π^-π^0$和$η_cπ^+π^-π^0$,这将有助于区分$ψ(3S)$和$D^*\bar{D}^*$分子状态分配用于这种新的增强。

英文摘要:

Very recently a new enhancement around 4.05 GeV was observed by Belle experiment. In this short note, we discuss some possible assignments for this enhancement, i.e. $ψ(3S)$ and $D^*\bar{D}^*$ molecular state. In these two assignments, Y(4008) can decay into $J/ψπ^0π^0$ with comparable branching ratio with that of $Y(4008)\to J/ψπ^+π^-$. Thus one suggests high energy experimentalists to look for Y(4008) in $J/ψπ^0π^0$ channel. Furthermore one proposes further experiments to search missing channel $D\bar{D}$, $D\bar{D}^*+h.c.$ and especially $χ_{cJ}π^+π^-π^0$ and $η_cπ^+π^-π^0$, which will be helpful to distinguish $ψ(3S)$ and $D^*\bar{D}^*$ molecular state assignments for this new enhancement.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑