Search for doubly heavy dibaryons in the quark delocalization color screening model

2021/05/31 by Zhuocheng Xia, Saijun Fan, Xinmei Zhu +2
Physics and Astronomy · #Atomic physics #Coupling (piping) #Delocalized electron #High-Energy Particle Collisions Research #Isospin #Materials science #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Resonance (particle physics) #Sigma #hep-ph #nucl-th

paper · pdf · doi:10.1103/physrevc.105.025201

9 pages, 3 figures

arxiv created 2021/05/31 · openalex publication_date 2022/02/03 · arxiv updated 2022/02/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We perform a systemical investigation of the low-lying doubly heavy dibaryon systems with strange S=0, isospin I=0, 1, 2, and the angular momentum J=0, 1, 2, 3 in the quark delocalization color screening model. We find the effect of channel-coupling cannot be neglected in the study of the multi-quark systems. Several bound systems are obtained. They are the doubly charm dibaryon systems with IJ=00, IJ=01, and IJ=02, and the corresponding energies are 4590, 4720, and 4764 MeV, respectively; and the doubly bottom dibaryon systems with IJ=00, IJ=02, and IJ=13, and the corresponding energies are 11\phantom\rule0.16em0ex219, 11\phantom\rule0.16em0ex416, and 11\phantom\rule0.16em0ex633 MeV, respectively. Besides, six resonance states are obtained, which are IJ=00\phantom\rule4pt0exN\mathrm\ensuremathΞ_cc and N\mathrm\ensuremathΞ_bb with resonance masses of 4730 and 11411 MeV respectively, IJ=11\phantom\rule4pt0exN\mathrm\ensuremathΞ_cc^* and N\mathrm\ensuremathΞ_bb^* with resonance masses of 4775 and 11432 MeV respectively, and IJ=12\phantom\rule4pt0ex\mathrm\ensuremathΣ_c\mathrm\ensuremathΣ_c^* and \mathrm\ensuremathΣ_b\mathrm\ensuremathΣ_b^* with resonance masses of 4935 and 11626 MeV respectively. All these heavy dibaryons are worth searching for in experiments, although it will be a challenging work.

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