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The constituent counting rule, determining the scaling behavior of the transition amplitudes in an exclusive process at high energies, is applied to probe the internal structure of the newly observed d*(2380) resonance. Several selected exclusive processes at high energies for the production of d* are discussed. Results of two structural scenarios for d*(2380), a hexaquark dominant compact system in the quark degrees of freedom, and a threebody bound state in the hadronic degrees of freedom, are analyzed and compared. A rather remarkable difference between the results of these two scenarios for the mentioned processes are addressed. 相似文献
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The decay widths of Υ(nS)→d~*(2380)+X with n=1,2,3 are studied in a phenomenological way. With the help of crossing symmetry, the decay widths are obtained by investigating the imaginary part of the forward scattering amplitudes between d~* and Υ(nS). The wave functions of d~* and deuteron obtained in previous studies are used for calculating the amplitude. The interaction between d~*(d) and Υ is governed by the quark-meson interaction, where the coupling constant is determined by fitting the observed widths of Υ(nS)→d+X. The numerical results show that the decay widths of Υ(nS)→d~*+X are about 2-10 times smaller than that of d+X. The calculated momentum of d~* is in the range 0.3-0.8 GeV. Therefore, it is very likely that one can find d~*(2380) in these semi-inclusive decay processes. 相似文献
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自旋相关的相对论修正对有限温度下重夸克偶素的结合和分解的影响进行了讨论,结果表明精细和超精细相互作用特影响对重夸克偶素性质的预言,特别是对ηc和J/ψ起着明显的作用. 相似文献
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利用相对论谐振子模型, 计算了重子共振态的螺旋度振幅, 并考察了相对论修正的影响. 相似文献
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相对论夸克模型用来计算面和N*的电产生振幅.介子云的贡献是一个重要的课题.计算表明考虑了介子云的作用对Δ和N*(1440)螺旋度振幅的解释将会有明显的改进.这有助于进一步认识Roper共振态的性质. 相似文献
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利用非相对论和相对论夸克模型分别计算了干涉截面对极化核子自旋结构函数的影响.计算所得到的明显的作用为今后实验上抽取核子自旋结构函数提供了依据. 相似文献
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利用夸克模型计算了核子的自旋相关结构函数随Q2的依赖关系.在小动量转移区研究高扭曲效应a2(Q2),d2(Q2)对结构函数的影响.计算结果和其它的一些模型理论计算做了比较. 相似文献
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考虑到共振区附近的极化核子结构函数既可以由重子共振态来解释,又可以利用非弹性物理的语言来说明这个二重性,低能区QCD扭曲效应对极化结构函数的影响可以得到预言. 相似文献