Author:
Yan Ye,Hu Xiaohuang,Wu Yuheng,Huang Hongxia,Ping Jialun,Yang Youchang
Abstract
AbstractMotivated by the recent observation of the$$\Lambda _c(2910)^+$$Λc(2910)+state in the$$\Sigma _{c}(2455)^{0,++}\pi ^{\pm }$$Σc(2455)0,++π±spectrum by the Belle Collaboration, we investigate the explanation of$$\Lambda _{c}$$Λcstates within the pentaquark framework using the quark delocalization color screening model (QDCSM). To check for bound states and resonance states, we utilize the real-scaling method. Additionally, we calculate the root mean square of cluster spacing to study the structure of the states and further estimate whether a state is a resonance state or not. Our numerical results show that$$\Lambda _{c}(2910)$$Λc(2910)cannot be interpreted as a molecular state, and$$\Sigma _{c}(2800)$$Σc(2800)cannot be explained as theNDmolecular state with$$J^P=1/2^-$$JP=1/2-. However, we find that$$\Lambda _{c}(2595)$$Λc(2595)can be interpreted as a molecular state with$$J^P=\frac{1}{2}^-$$JP=12-, where the main component is$$\Sigma _{c}\pi $$Σcπ. Similarly, we interpret$$\Lambda _{c}(2625)$$Λc(2625)as a molecular state with$$J^P=\frac{3}{2}^-$$JP=32-, where the main component is$$\Sigma _{c}^{*}\pi $$Σc∗π. We also suggest that$$\Lambda _{c}(2940)$$Λc(2940)is likely to be interpreted as a molecular state with$$J^P=3/2^-$$JP=3/2-, where the main component is$$ND^{*}$$ND∗. In addition, we predict two new states: a$$J^P=3/2^-$$JP=3/2-$$\Sigma _{c}\rho $$Σcρresonance state with a mass of 3140–3142 MeV, and a$$J^P=\frac{5}{2}^-$$JP=52-$$\Sigma _{c}^*\rho $$Σc∗ρstate with a mass about 3187–3188 MeV.
Funder
Postgraduate Research and Practice Innovation Program of Jiangsu Province
National Natural Science Foundation of China
Publisher
Springer Science and Business Media LLC
Subject
Physics and Astronomy (miscellaneous),Engineering (miscellaneous)
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