论文标题
QCD SUM规则研究隐藏式五角夸
QCD sum rule study for hidden-strange pentaquarks
论文作者
论文摘要
受到LHCB对隐藏障碍$ p_ {c（s）} $状态的观察的启发，我们研究了他们的隐藏式 - 巨型类似物$ p_s $ state in $ [udu] [udu] [\ bar ss] $和$ [uds]和$ [uds] [\ bar su] $配置。我们调查了$ p_s $ pentaquark以$pη^\ prime $，$ p其他$，$λk$，$σk$和$σ^\ ast k^\ ast k^\ ast $结构，带有$ j^p = \ frac {1} {1} {2} {2} {2} {2}^ - \ frac {3} {2}^ - $，并在QCD总规则的框架中计算其质量。我们的数值结果表明，所有$pη^\ prime $，$ p $，$λk$，$σk$和$σ^\ ast k^\ ast k^\ ast $结构的提取的强子质量均高于$σk$质量阈值和$σ^\ ast k $ and underest的质量\ ast \ ast \ ast \ ast \ ast \ ast \ ast的质量高得多。这样的渠道，与迄今为止的实验状态一致。
Inspired by the LHCb's observations of hidden-charm $P_{c(s)}$ states, we study their hidden-strange analogues $P_s$ states in both $[udu][\bar ss]$ and $[uds][\bar su]$ configurations. We investigate the $P_s$ pentaquark states in $pη^\prime$, $pϕ$, $ΛK$, $ΣK$ and $Σ^\ast K^\ast$ structures with $J^P = \frac{1}{2}^-$ and $Σ^\ast K$ and $ΣK^\ast$ with $J^P = \frac{3}{2}^-$, and calculate their masses in the framework of QCD sum rules. Our numerical results show that the extracted hadron masses for all the $pη^\prime$, $pϕ$, $ΛK$, $ΣK$ and $Σ^\ast K^\ast$ structures are much higher than $ΣK$ mass threshold and masses for $Σ^\ast K$ and $ΣK^\ast$ also higher than threshold of corresponding hadron, so that no bound state exists in such channels, which is consistent with the experimental status to date.
