论文标题
新观察到的狭窄$ω_b$结构的强烈衰减
Strong decays of the newly observed narrow $Ω_b$ structures
论文作者
论文摘要
由新观察到的狭窄结构$ω_b（6316）^ - $，$ω_b（6330）^ - $，$ω_b（6340）^ - $和$ω_b（6350）^ - $ in $之一，我们在$ y-$ spectrum的$ y $ y $ y-lode um模型中，$ω_b（6340）^ - $系统地。根据他们的群体和衰减宽度，观察到的$ω_b（6316）^ - $，$ω_b（6330）^ - $，$ω_b（6340）^ - $，$ω_b（6350）^ - $ $ $ $ $ resonances可以合理地分配为$λ-$ $ $ $ gom $ω_b（$λ-$ω_b（1p） 3/2^ - ，3/2^ - $和$ 5/2^ - $。同时，剩余的$ p-$波状态具有$ j^p = 1/2^ - $应该具有相当宽的宽度，实验几乎无法观察到这一点。对于$ω_b（2s）$和$ω_b（1D）$状态，我们的预测表明，这些状态的总宽度相对较窄，并且主要衰减到$ξ_b\ bar k $，$ξ_b^\ prime \ bar k $和$ξ_bk $和$ξ_b^{\ prime*} \ bar K $最终状态。这些丰富的理论预测对于在未来的实验中搜索更激动的$ω_b$状态可能很有价值。
Motivated by the newly observed narrow structures $Ω_b(6316)^-$, $Ω_b(6330)^-$, $Ω_b(6340)^-$, and $Ω_b(6350)^-$ in the $Ξ_b^0 K^-$ mass spectrum, we investigate the strong decays of the low-lying $Ω_b$ states within the $^3P_0$ model systematically. According to their masses and decay widths, the observed $Ω_b(6316)^-$, $Ω_b(6330)^-$, $Ω_b(6340)^-$, and $Ω_b(6350)^-$ resonances can be reasonably assigned as the $λ-$mode $Ω_b(1P)$ states with $J^P=1/2^-, 3/2^-, 3/2^-$, and $5/2^-$. Meanwhile, the remaining $P-$wave state with $J^P=1/2^-$ should have a rather broad width, which can hardly be observed by experiments. For the $Ω_b(2S)$ and $Ω_b(1D)$ states, our predictions show that these states have relatively narrow total widths and mainly decay into the $Ξ_b \bar K$, $Ξ_b^\prime \bar K$ and $Ξ_b^{\prime*} \bar K$ final states. These abundant theoretical predictions may be valuable for searching more excited $Ω_b$ states in future experiments.
