Spectroscopy and decays of the fully-heavy tetraquarks
Spectroscopy and decays of the fully-heavy tetraquarks
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DOI：
10.1140/epjc/s10052-018-6073-9
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发表时间：
2017-10
期刊：
影响因子：
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通讯作者：
M. N. Anwar;J. Ferretti;F. Guo;E. Santopinto;B. Zou
中科院分区：
文献类型：
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作者：
M. N. Anwar;J. Ferretti;F. Guo;E. Santopinto;B. Zou
我们讨论了全重四夸克的可能存在。在非相对论性的单胶子交换色库仑相互作用的有效场论框架下，在一个以单胶子交换色库仑相互作用为特征的相对化双夸克模型中，计算了底夸克束缚态的基态能量.我们的分析主张存在单味重四夸克束缚态。基态四夸克态质量为GeV。给出了最低态和相应的重夸克偶素之间的质量不等式关系，给出了基态质量的上限。最低能量的可能衰变被强调，这可能为正在进行的LHC实验中寻找它们提供有用的参考，其宽度估计为几十MeV。
We discuss the possible existence of the fully-heavy tetraquarks. We calculate the ground-state energy of thebound state, wherebstands for the bottom quark, in a nonrelativistic effective field theory framework with one-gluon-exchange (OGE) color Coulomb interaction, and in a relativized diquark model characterized by OGE plus a confining potential. Our analysis advocates the existence of uni-flavor heavy four-quark bound states. The ground statetetraquark mass is predicted to beGeV. Mass inequality relations among the loweststates, where, and the corresponding heavy quarkonia are presented, which give the upper limit on the mass of ground state. The possible decays of the lowestare highlighted, which might provide useful references in the search for them in ongoing LHC experiments, and its width is estimated to be a few tens of MeV.