论文标题
$ξ_{c/b} $和$ξ^\ prime_ {c/b} $ baryons的质量和衰减宽度
Masses and decay widths of $Ξ_{c/b}$ and $Ξ^\prime_{c/b}$ baryons
论文作者
论文摘要
在本文中，我们介绍了负平等$ξ'_{c/b} $和$ξ_{c/b} $ $ $ p $ - 波状态的完整分类：7属于$ su（3）$ sextet和7属于the Flavor Anti-tiplet，the Anti-triplet的计算$^2σ_c\ bar {k} $，$^2ξ_C^{'}π$，$^2σ_c\ bar {k} $，$^4ξ_C^{'}π$，$λ_C^{'}基本发射模型（EEM）和$^3P_0 $模型，以及用于$ξ'__ {C/B} $和$ξ_{C/B} $辐射衰减的电磁衰减宽度的计算。通过平等间隔的质量规则以及通过对强部分衰减宽度的分析，我们建议新的LHCB $ξ_{C}（2923）$，$ξ_{C}（2939）$，以及$ξ_{C}（2965）$ State（2965）$ and $} $} c {我们的结果可以通过LHCB和Belle的未来实验来测试，从而删除了剩余的缺失信息，{\ it iC。}量子数。最后，在$ξ_c$状态的三夸克和夸克 - diquark描述之间进行了比较。最近，LHCB合作报告了观察到两个新的$ξ_b$状态，即$ξ_b（6327）^{0} $和$ξ_b（6333）$，in $λ_b^0 k^0 k^{ - }π^{+} $通道，具有统计学上的重要性，具有统计上的重要性。这两种状态的实验质量和宽度与我们的质量和宽度预测一致，$ j^{p} _ {p} _ {ξ_b（6327）^{0}} = \ frac {3} {3} {3} {2} {2} {2} {2}^{+} {+ $ j^{p} _ {ξ_b（6333）^{0}}} = \ frac {5} {2} {2}^{+} $。
In this article, we present a complete classification of the negative parity $Ξ'_{c/b}$ and $Ξ_{c/b}$ $P$-wave states: 7 belonging to the $SU(3)$ flavor sextet and 7 to the flavor anti-triplet, the calculation of the $Ξ'_{c/b}$ and $Ξ_{c/b}$ strong partial decay widths into $^2Σ_c \bar{K}$, $^2Ξ_c^{'} π$, $^2Σ_c \bar{K}$, $^4Ξ_c^{'} π$, $Λ_c^{'} \bar{K}$, $Ξ_c^{} π$ and $Ξ_c^{} η$ channels both within the Elementary Emission Model (EEM) and the $^3P_0$ model, and the calculation of the electromagnetic decay widths for $Ξ'_{c/b}$ and $Ξ_{c/b}$ radiative decays. By means of the equal-spacing mass rule and by the analysis of the strong partial decay widths, we suggest possible assignments for the new LHCb $Ξ_{c}(2923)$, $Ξ_{c}(2939)$, and $Ξ_{c}(2965)$ states, as well as for the $Ξ_{c}$'s previously reported by Belle and BaBar. Our results can be tested by future experiments, at LHCb and Belle, disentangling the remaining missing piece of information, {\it i.e.} the quantum numbers. Finally, a comparison is made between a three-quark and a quark-diquark description of $Ξ_c$ states. Very recently the LHCb collaboration reported the observation of two new $Ξ_b$ states, namely $Ξ_b(6327)^{0}$ and $Ξ_b(6333)$, in $Λ_b^0 K^{-} π^{+}$ channel with a statistical significance larger than nine standard deviations. The experimental masses and widths of these two states are consistent with our mass and width predictions for the doublet of D-wave excitations of the $Ξ_b$ system with $J^{P}_{Ξ_b(6327)^{0}}=\frac{3}{2}^{+}$ and $J^{P}_{Ξ_b(6333)^{0}}=\frac{5}{2}^{+}$.
