论文标题
识别LHCB观察到的$ξ_c^0 $ baryons为$ p $ -Wave $ξ_c^\ prime $ baryons
Identifying the $Ξ_c^0$ baryons observed by LHCb as $P$-wave $Ξ_c^\prime$ baryons
论文作者
论文摘要
我们系统地研究$ p $ -Wave $ - 波$ su（3）$ su（3）$ su（3）$ \ mathbf {6} _f $的质谱和衰减特性，使用QCD总规则和轻键总和规则在重质量有效理论的框架内。我们的结果表明，LHCB最近观察到的三个激动的$ξ_c^0 $ BARYON可以很好地解释为$ p $ -Wave $ -P $ξ_c^\ prime $ baryons：$ξ_c（2923）^0 $ and $ξ_c（2939）（2939）^0 $是$ J^p = 1/2^ - 2^ - 2^ - 2^ - 2^ - 2^/2^/$ 3/ $λ$ - 模式轨道激发； $ξ_c（2965）^0 $具有$ j^p = 3/2^ - $，还包含一个$λ$ - mode轨道激发。我们建议在未来实验中搜索$ j^p = 5/2^ - $ $ j^p = 5/2^ - $ $ j^p = 5/2^ - $的$ p $ -wave $ -wave $ -wave $ -wave $ξ_c^\ prime $ state of $ j^p = 5/2^ - $。它的质量约为$ 56^{+30} _ { - 35} $ MEV比$ξ_c（2965）^0 $大，其宽度约为$ 18.1^{+19.7} _ { - 〜8.3} $ MEV。
We systematically study mass spectra and decay properties of $P$-wave $Ξ_c^\prime$ baryons of the $SU(3)$ flavor $\mathbf{6}_F$, using the methods of QCD sum rules and light-cone sum rules within the framework of heavy quark effective theory. Our results suggest that the three excited $Ξ_c^0$ baryons recently observed by LHCb can be well explained as $P$-wave $Ξ_c^\prime$ baryons: the $Ξ_c(2923)^0$ and $Ξ_c(2939)^0$ are partner states of $J^P = 1/2^-$ and $3/2^-$ respectively, both of which contain one $λ$-mode orbital excitation; the $Ξ_c(2965)^0$ has $J^P = 3/2^-$, and also contains one $λ$-mode orbital excitation. We propose to search for another $P$-wave $Ξ_c^\prime$ state of $J^P = 5/2^-$ in the $Λ_c K/Ξ_c π$ mass spectral in future experiments. Its mass is about $56^{+30}_{-35}$ MeV larger than the $Ξ_c(2965)^0$, and its width is about $18.1^{+19.7}_{-~8.3}$ MeV.
