Dynamical supersymmetry for the strange quark and ud antidiquark in the hadron mass spectrum
Dynamical supersymmetry for the strange quark and ud antidiquark in the hadron mass spectrum
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强子质谱中奇异夸克和ud反双夸克的动力学超对称性
DOI：
10.1093/ptep/ptz090
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发表时间：
2019
影响因子：
3.5
通讯作者：
Jido Daisuke
中科院分区：
文献类型：
--
作者：
Amano Taiju;Jido Daisuke
通过推测自旋为0的双夸克与成分夸克具有相似的质量，我们引入了夸克和双夸克之间的对称性。构造了这种对称性的代数，我们把自旋为上下的三重夸克和自旋为0的双夸克作为这个代数的基本表示。我们进一步建立由基本表示的直积构成的更高的表示。我们建议将强子赋值给这个代数的倍数。特别地，我们发现，和分别形成一个三重态、一个非重态和一个五重态，其中有一个真正的四夸克介子由。通过引入由于夸克和双夸克质量差异引起的对称性破缺，我们还发现了它们之间的质量关系。根据对称性破缺和的质量估计，可能的四夸克和的质量分别为2.942 GeV和6.261 GeV。
Speculating that thediquark with spin 0 has a similar mass to the constituentquark, we introduce a symmetry between thequark and thediquark. Constructing an algebra for this symmetry, we regard a triplet of thequarks with spin up and down and thediquark with spin 0 as a fundamental representation of this algebra. We further build higher representations constructed by direct products of the fundamental representations. We propose assignments of hadrons to the multiples of this algebra. We find in particular that,, andform a triplet, a nonet, and a quintet, respectively, whereis a genuine tetraquark meson composed of. We also find a mass relation between them by introducing symmetry breaking due to the mass difference between thequark and thediquark. The masses of the possible tetraquarksandare estimated from the symmetry breaking and the masses ofandto be 2.942 GeV and 6.261 GeV, respectively.