Dynamical study of S-wave QQqq system

2017/12/26 by Youchang Yang, You-Chang Yang, Zhiyun Tan +7
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.1712.09285

11 pages, 1 figure

arxiv created 2017/12/26 · openalex publication_date 2017/12/26 · arxiv updated 2017/12/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We perform the energy spectra calculating for the S-wave QQqq (where Q=c,b and q=u,d,s) system within two constituent quark models. The bound states of B^*B^* with I(J^PC)=1(0⁺⁺),~1(1^+-),~0(2⁺⁺) and BB^* with isospin I=1, or 0 are obtained in color-singlet-singlet channel. If considering the coupling of color channels, apart from the deep bound states appear in [bq]^(*)[qb]^(*) scenario, a bound state [cq]^*[qc]^* with I(J^PC)=1(0⁺⁺) is also formed. The BB^* and the B^*B^* with quantum number 1(1^+-) are well candidates for Z_b^±(10610) and Z_b^±(10650) reported by Belle collaboration respectively, while the BB^* with isospin 0 can be interpret as a candidate for Z_b⁰(10610). A bound state [cq]^*[qc]^* with I(J^PC)=1(0⁺⁺) is comparable with Z_c⁺(4025) announced by BES.

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