Dynamical Study of S-Wave $$\bar{Q}Q\bar{q}q$$ Q ¯ Q q ¯ q System

Autor: Jialun Ping, Youchang Yang, Hong-Shi Zong, Zhi-Yun Tan
Rok vydání: 2018
Předmět:
Zdroj: Few-Body Systems. 60
ISSN: 1432-5411
0177-7963
DOI: 10.1007/s00601-018-1477-5
Popis: The spectrum of the S-wave $$\bar{Q}Q\bar{q}q$$ (where $$Q=c,b$$ and $$q=u,d,s$$ ) system are studied within two constituent quark models. The bound states of $$B^*\bar{B}^*$$ with $$I(J^{PC})=1(0^{++}),~1(1^{+-}),~0(2^{++})$$ and $$B\bar{B}^*$$ 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 $$[b\bar{q}]^{(*)}[q\bar{b}]^{(*)}$$ scenario, a bound state $$[c\bar{q}]^*[q\bar{c}]^*$$ with $$I(J^{PC})=1(0^{++})$$ is also formed. The $$B\bar{B}^*$$ and the $$B^*\bar{B}^*$$ with quantum number $$1(1^{+-})$$ are good candidates for $$Z_b^{\pm }(10{,}610)$$ and $$Z_b^{\pm }(10{,}650)$$ reported by Belle Collaboration respectively, while the $$B\bar{B}^*$$ with isospin 0 can be interpret as a candidate for $$Z_b^{0}(10{,}610)$$ . A bound state $$[c\bar{q}]^*[q\bar{c}]^*$$ with $$I(J^{PC})=1(0^{++})$$ may be found in the $$e^+e^-\rightarrow D^*\bar{D}^*\pi \pi $$ channel in the future by BES and other experimental collaborations.
Databáze: OpenAIRE
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