扩展手征组分夸克模型研究 Zc(3900)
Study on Zc(3900) by the Extended Chiral Constituent Quark Model
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摘要: 近似考虑多体相互作用效果后扩展了手征组分夸克模型,并采用多高斯展开算法计算了量子数为 IG JP =1+1+的四夸克系统 cu珋c珔d能谱。在不改变任何参数的情况下,得到它的质量为3869 M eV ,比 D倡 D珡理论阈值低13 M eV ,该结论与实验发现的 Zc (3900)完全吻合。Abstract: Taking into account the multi‐body effect in the four‐quark system ,we modified the chiral con‐stituent quark model ,and calculated the spectrum of cucd with quantum numbers IG JP = 1+ 1+ by the Gaussian expansion method .With no parameters changed in our calculation ,we obtained its mass about 3 869 MeV ,which is about 13 MeV lower than the threshold of D * D珡and agrees well with the experimen‐tal data .
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