论文标题
$η_1（1855）$的分析为$ k \ bar {k} _1（1400）$分子状态
Analysis of the $η_1(1855)$ as a $K\bar{K}_1(1400)$ molecular state
论文作者
论文摘要
在这项工作中，我们研究了$ s $ - 波的辐射衰减$ k \ bar {k} _1（1400）$在有效的拉格朗日方法中分子状态，并找到$ k \ bar {k \ bar {k} _1（1400）$分子状态与新观察到的$η_1（18555）的关系。预测表明，衰减宽度最高可达$ 182.97^{+2.79} _ { - 3.50} $ MEV，可以面对实验数据。如果$η_1（1855）$可能是$ s $ -wave $ k \ bar {k} _1（1400）$分子状态，则$ k \ bar {k}^{*}π$三体衰减提供了主要的贡献，而不是在实验中找到的$η^{'} $通道。此外，$η_1（1855）\ toγϕ $的部分宽度可达到$ 17.95^{+0.21} _ { - 0.43} $ kev。这些结果可以在将来的实验中测量，并用于测试$η_1（1855）$的性质。
In this work, we study the radiative and strong decay of $S$-wave $K\bar{K}_1(1400)$ molecular state within the effective Lagrangians approach and find the relation between the $K\bar{K}_1(1400)$ molecular state and the newly observed $η_1(1855)$ state by comparing with the BESIII observation. The prediction indicates that the decay width can reach up to $182.97^{+2.79}_{-3.50}$ MeV, which can be confronted with the experimental data. If the $η_1(1855)$ could be $S$-wave $K\bar{K}_1(1400)$ molecular state, the $K\bar{K}^{*}π$ three-body decay provides the dominant contribution, not the $ηη^{'}$ channel found in the experiment. In addition, the partial width for $η_1(1855)\toγϕ$ can reach up to $17.95^{+0.21}_{-0.43}$ KeV. Those results can be measured in future experiments and used to test the nature of the $η_1(1855)$.
