论文标题
双重迷人的五角星
Doubly Charmed Pentaquarks
论文作者
论文摘要
LHCB的合作使用其完整数据集，从运行$ 1 $和2美元宣布，$ 2019 $ $ 2019 $ P_C（4380）^+$和$ P_C（4450）^+$的令人惊讶的更新在2015年观察到。此外，将原始的$ p_c（4450）$共振分为两个个别状态，称为$ p_c（4440）^+$和$ p_c（4457）^+$。由于这些新的隐藏式五角夸克国家通过我们的手性夸克模型成功预测了这一事实，我们将此类研究扩展到了双重迷人的部门。分析的总旋转和均等量子数为$ j^p = \ frac12^ - $，$ \ frac32^ - $和$ \ frac52^ - $，在$ i = \ frac12 $和$ \ frac32 $ isospin Channel中。我们发现几个可能的狭窄的baryon-meson共振（括号中的理论质量）：$ ij^p = \ frac12 \ frac12^ - $ $ $ $点平d（4356）$，$ \ frac12 \ frac12 \ frac32 \ frac32^ - $ $ $ $ $ $ $ $ $ $ $ q^*_ c d（4449）$ \ frac32 $ \ frac32 $ \ frac32 $ \ frac32 $ \ frac32 \ frac32 $ \ frac32 c. d（4431）$，$ \ frac32 \ frac12^ - $ $ $σ_cd（4446）$，$ \ frac32 \ frac32 \ frac32^ - $ $ $ $ acc d^*（4514）$和$ \ \ \ \ \ \ \\ frac32 \ frac52 \ frac52^ - $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ ex^*whr whr whr whr whr $ 4.8 $，$ 8.0 $，$ 2.6 $，$ 2.2 $，$ 4.0 $和$ 3.0 \，\ text {mev} $。此外，也找到一个浅层状态，带有量子数$ ij^p = \ frac12 \ frac32^ - $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $之一。预计将在未来的实验中确定这些双重迷人的五角夸克州。
The LHCb Collaboration, using its full data set from runs $1$ and $2$, announced in $2019$ a surprising update of the hidden-charm pentaquark states $P_c(4380)^+$ and $P_c(4450)^+$, observed in 2015. A new state, $P_c(4312)^+$, was clearly seen at lower energies; furthermore, the original $P_c(4450)$ resonance was resolved into two individual states, named the $P_c(4440)^+$ and the $P_c(4457)^+$. Motivated by the fact that these new hidden-charm pentaquark states were successfully predicted by our chiral quark model, we extend herein such study to the doubly charmed sector. The analyzed total spin and parity quantum numbers are $J^P=\frac12^-$, $\frac32^-$ and $\frac52^-$, in the $I=\frac12$ and $\frac32$ isospin channels. We find several possible narrow baryon-meson resonances (theoretical masses in parenthesis): $IJ^P = \frac12 \frac12^-$ $Σ_c D(4356)$, $\frac12 \frac32^-$ $Σ^*_c D(4449)$, $\frac32 \frac12^-$ $Σ_c D(4431)$, $\frac32 \frac12^-$ $Σ_c D(4446)$, $\frac32 \frac32^-$ $Σ_c D^*(4514)$ and $\frac32 \frac52^-$ $Ξ^*_{cc} ρ(4461)$ whose widths are $4.8$, $8.0$, $2.6$, $2.2$, $4.0$ and $3.0\,\text{MeV}$, respectively. Moreover, one shallow bound-state is found, too, with quantum numbers $IJ^P = \frac12 \frac32^-$ $Ξ^*_{cc} π(3757)$. These doubly charmed pentaquark states are expected to be identified in future experiments.
