Confronting pentaquark photoproduction with new LHCb observations
Confronting pentaquark photoproduction with new LHCb observations
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DOI：
10.1103/physrevd.100.054033
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发表时间：
2019-04
影响因子：
5
通讯作者：
Xu Cao;J. Dai
中科院分区：
文献类型：
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作者：
Xu Cao;J. Dai
LHCb合作新测量的Pc$态的产生分数限制了它们的分支比$J/\psi p$衰变，从而限制了它们在$\Gamma p\to J/\psi p$反应中的光产生。我们展示了LHCb结果与目前寻找光生产物的实验之间的紧张关系。我们还发现，现有的关于$P_c与J/psi p的分枝比的信息已经尖锐地与研究$P_c的性质的模型发生了冲突。
The newly measurement of production fractions of $P_c$ states by LHCb collaboration have put restriction on their branching ratios of $J/\psi p$ decay, thus constraining their photoproduction in $\gamma p\to J/\psi p$ reaction. We show the tension between LHCb results and the current experiments in search of $P_c$ photoproduction. We also find that the present information of branching ratios of $P_c\to J/\psi p$ has already confronted sharply with the models which study the nature of $P_c$.