Determining 1-- heavy hybrid masses via QCD sum rules

被引：25

作者：

Qiao, Cong-Feng ^{[1
,2
]}

Tang, Liang ^{[1
]}

Hao, Gang ^{[2
]}

Li, Xue-Qian ^{[1
]}

机构：

[1] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Dept Phys, Beijing 100049, Peoples R China

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2012年 / 39卷 / 01期

基金：

中国国家自然科学基金;

关键词：

EXOTIC MESONS; RESONANCE PHYSICS; EXCITED GLUE; EXCITATIONS; COUPLINGS; STATES; DECAY;

D O I：

10.1088/0954-3899/39/1/015005

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

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 the charm sector lies in m(Hc) = 4.12 similar to 4.79 GeV, while in the bottom sector the hybrid may be situated in m(Hb) = 10.24 similar to 11.15 GeV. Since the numerical result on the charmonium hybrid mass is not compatible with the charmonium spectra, including structures newly observed in experiment, we attempt 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 the bottomonium hybrid coincides with the 'exotic structure' recently observed at BELLE.

引用

页数：9

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