Are NΩ bound states?

2020/04/24 by Hongxia Huang, Xinmei Zhu, Huang, Hongxia +7
Physics and Astronomy · #Quantum Chromodynamics and Particle Interactions #Physics of Superconductivity and Magnetism #Particle physics theoretical and experimental studies

paper · pdf · doi:10.48550/arxiv.2004.12876

Abstract

Inspired by the progress of the experimental search of the N\Ω dibaryon\nby the STAR collaboration, we study N\\Ω systems in the framework of\nquark delocalization color screening model. Our results show that the\nattraction between N and \\Ω is a little bit larger than that\nbetween N and \Ω, which indicates that it is more possible for the\nN\\Ω than the N\Ω system to form bound states. The dynamic\ncalculations state that both the J^P=1⁺ and 2⁺ N\\Ω\nsystems are bound states. The binding energy of these two states are deeper\nthan that of N\Ω systems with J^P=2⁺, and the N\Ω system\nwith J^P=1⁺ is unbound. The calculation of the low-energy scattering\nphase shifts, scattering length and the effective range also supports the\nexistence of the N\\Ω bound states with J^P=1⁺ and 2⁺.\nSo the N\\Ω states are better hexaquark states and stronger signals\nare expected in experiments.\n

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