Strange molecular partners of the Z(c)(3900) and Z(c)(4020)
Strange molecular partners of the Z(c)(3900) and Z(c)(4020)
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Z(c)(3900) 和 Z(c)(4020) 的奇怪分子伙伴
DOI：
10.1103/physrevd.103.074029
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发表时间：
2021
影响因子：
5
通讯作者：
Valderrama Manuel Pavon
中科院分区：
文献类型：
--
作者：
Yang Zhi;Cao Xu;Guo Feng-Kun;Nieves Juan;Valderrama Manuel Pavon
量子色动力学提出了一系列精确和近似的对称性，可以用来预测新的强子从以前已知的。理论上被认为是等矢量和分子的和也不例外。在这里，我们认为，从SU（3）味对称性，我们应该预期的存在奇怪的伙伴的强子分子构型和（或，等价地，夸克内容，与）。这些结构的量子数是。这些伙伴的预测质量取决于所使用的理论方案的细节，但它们应该分别在和阈值附近。此外，这些状态中的任何一个都可以是虚拟极点或共振。我们表明，连同一个可能的三角形奇点的贡献，这样的图片很好地同意最近的BESIII数据的。
Quantum chromodynamics presents a series of exact and approximate symmetries which can be exploited to predict new hadrons from previously known ones. Theand, which have been theorized to be isovectorandmolecules [], are no exception. Here we argue that from SU(3)-flavor symmetry, we should expect the existence of strange partners of the’s with hadronic molecular configurationsand(or, equivalently, quark content, with,). The quantum numbers of theseandstructures would be. The predicted masses of these partners depend on the details of the theoretical scheme used, but they should be around theandthresholds, respectively. Moreover, any of these states could be either a virtual pole or a resonance. We show that, together with a possible triangle singularity contribution, such a picture nicely agrees with the very recent BESIII data of the.