论文标题
$ qqq \ bar {q} q $ pentaquark系统的研究
Study of $qqq\bar{q}Q$ pentaquark system in the Chiral Quark Model
论文作者
论文摘要
随着LHCB合作的发现，发现了一些隐藏的Pentaquark共鸣，对包含沉重夸克的Pentaquark国家的调查引起了理论家的兴趣。我们在此处研究$ qqq \ bar {q} q $（$ q = u $或$ d $，$ q = c $或$ b $）pentaquark系统，在手性夸克型号的框架内。因此，通过五体动力学计算，某些迷人和底部的五角夸被认为存在。在魅力部门中，$σ_cπ（ij^p = 0 \ frac {1} {2}^ - ）$和$σ_c^*π（ij^p = 0 \ frac {3} {2}^ - ）$是$λ_c（2595）$和$λ_c（2625）的候选者。此外，在能源区域的能源区域3.2 \ 3.2 \ sim 3.3 $ gev中，也可以找到两个高旋转状态，$σ_c^*ρ（IJ^p = 0 \ frac {5} {5} {2}^ - ）$和$ΔD^*（ij^p = 1 \ frac {5} {2}^ - ）$在底部扇区中，$σ_bπ（ij^p = 0 \ frac {1} {2}^ - ）$，$σ_b^*π（ij^p = 0 \ frac {3} {2}^ - ）$可能是$ $λ_b（5912）$和$ up $λ_b（5920）的候选者。和$σ_b^*ρ（ij^p = 0 \ frac {5} {2}^ - ）$和$ΔB^*（ij^p = 1 \ frac {5} {2}^ - ）$在$ 6.5 \ sim 6.6 $ gev的能量区域中找到。 $σ_C^{（*）}π$和$σ_b^{（*）}π$被预期为紧凑状态，而$σ_c^*ρ$，$σ_b^*ρ$，$ΔD^*$和$ΔB^$和$ΔB^*$预计作为分子状态。
With the discovery of some hidden-charm pentaquark resonances by the LHCb Collaboration, investigations of pentaquark states containing heavy quarks have aroused the interest of theorists. We study herein $qqq\bar{q}Q$ ($q = u$ or $d$, $Q=c$ or $b$) pentaquark system, in the framework of the chiral quark model. In consequence, some charmed and bottomed pentaquarks are considered to exist by five-body dynamical calculations. In the charm sector, $Σ_cπ(IJ^P=0\frac{1}{2}^-)$ and $Σ_c^*π(IJ^P=0\frac{3}{2}^-)$ are possible candidates of $Λ_c(2595)$ and $Λ_c(2625)$, respectively. Besides, two high-spin states, $Σ_c^*ρ(IJ^P=0\frac{5}{2}^-)$ and $ΔD^*(IJ^P=1\frac{5}{2}^-)$, are also found in the energy region of $3.2 \sim 3.3$ GeV. In the bottom sector, $Σ_bπ(IJ^P=0\frac{1}{2}^-)$, $Σ_b^*π(IJ^P=0\frac{3}{2}^-)$ could be candidates of $Λ_b(5912)$ and $Λ_b(5920)$, respectively. And $Σ_b^*ρ(IJ^P=0\frac{5}{2}^-)$ and $ΔB^*(IJ^P=1\frac{5}{2}^-)$ are found in the energy region of $6.5 \sim 6.6$ GeV. $Σ_c^{(*)}π$ and $Σ_b^{(*)}π$ are expected as compact states, while $Σ_c^*ρ$, $Σ_b^*ρ$, $ΔD^*$ and $ΔB^*$ are expected as molecular states.
