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arXiv 1012.2614hep-ph
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用QCD求和规则确定$1^{--}$重混合质量

Determining $1^{--}$ Heavy Hybrid Masses via QCD Sum Rules

Cong-Feng Qiao, Liang Tang, Gang Hao, Xue-Qian Li

摘要:

用QCD求和规则计算了$1^{--}$粲偶素和底偶素的质量。我们发现魅扇区的基态杂合体位于$m_{H_c}=4.12\sim 4.79$ GeV,而底扇区的杂合体可能位于$m_{H_b} = 10.24\sim 11.15$ GeV。由于粲偶素杂化质量的数值结果与粲偶素光谱不相容,包括实验中新观察到的结构,我们试图得出这样的结论:这种杂化物并不纯粹存在,而是作为与其他状态的混合物,如胶球和规则夸克偶素,在实验观察中。然而,我们的结果bottomonium混合一致的“异国情调的结构”最近观察到的BELLE。

英文摘要:

The masses of $1^{--}$ charmonium and bottomonium hybrids are evaluated in terms of QCD sum rules. We find that the ground state hybrid in charm sector lies in $m_{H_c}=4.12\sim 4.79$ GeV, while in bottom sector the hybrid may situated in $m_{H_b} = 10.24\sim 11.15$ GeV. Since the numerical result on charmonium hybrid mass is not compatible with the charmonium spectra, including structures newly observed in experiment, we tempt to conclude that such a hybrid does not purely exist, but rather as an admixture with other states, like glueball and regular quarkonium, in experimental observation. However, our result on bottomonium hybrid coincide with the "exotic structure" recently observed at BELLE.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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