Is JPC=3-+ molecule possible? |
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引用本文: | 朱伟,刘言锐,姚涛.Is JPC=3-+ molecule possible?[J].中国物理 C,2015,39(2):13-20. |
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作者姓名: | 朱伟 刘言锐 姚涛 |
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作者单位: | School of Physics, Shandong University, Shandong 250100, China |
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基金项目: | Supported by National Natural Science Foundation of China(11275115);Shandong Province Natural Science Foundation(ZR2010AM023);SRF for ROCS,SEM,and Independent Innovation Foundation of Shandong University |
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摘 要: | The confirmation of charged charmonium-like states indicates that heavy quark molecules should exist.Here we discuss the possibility of a molecule state with J P C= 3-+. In a one-boson-exchange model investigation for the S wave C = + D* ˉD*2states, one finds that the strongest attraction is in the case J = 3 and I = 0 for bothπ and σ exchanges. Numerical analysis indicates that this hadronic bound state might exist if a phenomenological cutoff parameter around 2.3 Ge V(1.5 Ge V) is reasonable with a dipole(monopole) type form factor in the one-pionexchange model. The cutoff for binding solutions may be reduced to a smaller value once the σ exchange contribution is included. If a state around the D* ˉD*2threshold(≈4472 Me V) in the channel J/ψω(P wave) is observed, the heavy quark spin symmetry implies that it is not a cˉc meson and the J P C are likely to be 3-+.
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关 键 词: | exotic state molecule heavy quark |
收稿时间: | 2014-5-16 |
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