The role of hidden-color components in the tetraquark mixing model
arxiv(2024)
摘要
Multiquarks can have two-hadron components and hidden-color components in
their wave functions. The presence of two-hadron components in multiquarks
introduces a potential source of confusion, particularly with respect to their
resemblance to hadronic molecules. On the other hand, hidden-color components
are essential for distinguishing between multiquarks and hadronic molecules. In
this work, we study the hidden-color components in the wave functions of the
tetraquark mixing model, a model that has been proposed as a suitable framework
for describing the properties of two nonets in the J^P=0^+ channel: the light
nonet [a_0 (980), K_0^* (700), f_0 (500), f_0 (980)] and the heavy
nonet [a_0 (1450), K_0^* (1430), f_0 (1370), f_0 (1500)]. Our analysis
reveals a substantial presence of hidden-color components within the tetraquark
wave functions. To elucidate the impact of hidden-color components on physical
quantities, we conduct computations of the hyperfine masses, ⟨
V_CS⟩, for the two nonets, considering scenarios involving only the
two-meson components and those incorporating the hidden-color components. We
demonstrate that the hidden-color components constitute an important part of
the hyperfine masses, such that the mass difference formula, Δ M≈Δ⟨ V_CS⟩, which has been successful for the two nonets,
cannot be achieved without the hidden-color contributions. This can provide
another evidence supporting the tetraquark nature of the two nonets.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要