X 0(2900) and its heavy quark spin partners in molecular picture
X 0(2900) and its heavy quark spin partners in molecular picture
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DOI：
10.1088/1674-1137/abcfaa
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发表时间：
2020-08
影响因子：
3.6
通讯作者：
M. Hu 胡;Xue-Yi 雪怡 Lao 劳;Pan 攀 Ling 凌;Qian 倩 Wang 王
中科院分区：
文献类型：
--
作者：
M. Hu 胡;Xue-Yi 雪怡 Lao 劳;Pan 攀 Ling 凌;Qian 倩 Wang 王
最近LHCb合作组织在过程的不变质量中观察到的，是第一个具有四种不同口味的奇异候选者，开始了强子社区的新时代。在强子分子的假设下，我们提取了由二重态和介子构成的整个重夸克对称多重态。对于束缚态的情况，会有两个额外的强子分子与和通道，以及一个额外的分子。在轻夸克极限中，它们分别在和阈值之下，这是由夸克的质量位置确定的。对于虚态情况，将有一个强耦合到通道的额外强子分子和一个额外的分子。寻找这些重夸克自旋伙伴将有助于揭示宇宙的本质。
The , recently observed by the LHCb Collaboration in the invariant mass of the process, is the first exotic candidate with four different flavors, beginning a new era for the hadron community. Under the assumption that the is a hadronic molecule, we extracted the whole heavy-quark symmetry multiplet formed by the doublet and the meson. For the bound state case, there would be two additional hadronic molecules associated with the and channels, as well as one additional molecule. In the light quark limit, they are and below the and thresholds, respectively, which are unambiguously fixed by the mass position of the . For the virtual state case, there would be one additional hadronic molecule, strongly coupled to the channel, and one additional molecule. Searching for these heavy quark spin partners will help shed light on the nature of the .