Quantum numbers of the pentaquark states ${{\rm{P}}}_{{\rm{c}}}^{+}$ via symmetry analysis |
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Authors: | Chong-yao Chen Muyang Chen Yu-Xin Liu |
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Institution: | 1.Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China;2.Collaborative Innovation Center of Quantum Matter, Beijing 100871, China;3.Center for High Energy Physics, Peking University, Beijing 100871, China |
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Abstract: | We investigate the quantum numbers of the pentaquark states ${{\rm{P}}}_{{\rm{c}}}^{+}$, which are composed of 4 (three flavors) quarks and an antiquark, by analyzing their inherent nodal structure in this paper. Assuming that the four quarks form a tetrahedron or a square, and the antiquark is at the ground state, we determine the nodeless structure of the states with orbital angular moment L≤3, and in turn, the accessible low-lying states. Since the inherent nodal structure depends only on the inherent geometric symmetry, we propose the quantum numbers JP of the low-lying pentaquark states ${{\rm{P}}}_{c}^{+}$ may be ${\tfrac{3}{2}}^{-}$, ${\tfrac{5}{2}}^{-}$, ${\tfrac{3}{2}}^{+}$and ${\tfrac{5}{2}}^{+}$, independent of dynamical models. |
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Keywords: | pentaquark states exotic hadrons color confinement symmetry analysis |
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