论文标题
具有四种不同口味的四夸克状态的光谱和重排腐烂
Spectrum and rearrangement decays of tetraquark states with four different flavors
论文作者
论文摘要
我们已经系统地研究了使用颜色磁相互作用模型的四种不同口味的外来四夸克状态的质谱和重排衰减特性。 Their masses are estimated by assuming that the $X(4140)$ is a $cs\bar{c}\bar{s}$ tetraquark state and their decay widths are obtained by assuming that the Hamiltonian for decay is a constant.根据所采用的方法，我们发现最稳定的状态可能是Isoscalar $ bs \ bar {u} \ bar {d} $和$ cs \ bar {u} \ bar {d} $，带有$ j^p = 0^p = 0^+$和$ 1^+$。大多数不稳定的四夸克人的宽度大约是数十MEV，但是对于不稳定的$ cu \ bar {s} \ bar {d} $和$ cs \ bar {u} \ bar {d} $的宽度可能是100 mev。对于$ x（5568）$，如果是$ bu \ bar {s} \ bar {d} $ tetraquark state，我们的方法不能给出一致的质量和宽度。对于$ i（j^p）= 0（0^+），0（1^+）$ double-double-t_ {bc} = bc \ bar {u} \ bar {d} $状态，它们的宽度可以是几个MEV。
We have systematically investigated the mass spectrum and rearrangement decay properties of the exotic tetraquark states with four different flavors using a color-magnetic interaction model. Their masses are estimated by assuming that the $X(4140)$ is a $cs\bar{c}\bar{s}$ tetraquark state and their decay widths are obtained by assuming that the Hamiltonian for decay is a constant. According to the adopted method, we find that the most stable states are probably the isoscalar $bs\bar{u}\bar{d}$ and $cs\bar{u}\bar{d}$ with $J^P=0^+$ and $1^+$. The width for most unstable tetraquarks is about tens of MeVs, but that for unstable $cu\bar{s}\bar{d}$ and $cs\bar{u}\bar{d}$ can be around 100 MeV. For the $X(5568)$, our method cannot give consistent mass and width if it is a $bu\bar{s}\bar{d}$ tetraquark state. For the $I(J^P)=0(0^+),0(1^+)$ double-heavy $T_{bc}=bc\bar{u}\bar{d}$ states, their widths can be several MeVs.
