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arXiv 2109.07040hep-ph
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具有一个和两个开重夸克的强子的质量和磁矩:重子和四夸克

Masses and magnetic moments of hadrons with one and two open heavy quarks: heavy baryons and tetraquarks

Wen-Xuan Zhang, Hao Xu, Duojie Jia

摘要:

本文在MIT袋模型的统一框架下,计算了具有一种和两种开重味的重子和四夸克的质量和磁矩。利用MIT袋模型的参数,证实了文献中重夸克($c$和$b$)之间以及重夸克和奇夸克之间存在的额外结合能是轻强子和重强子调和所必需的.对所有的轻介子和具有一种和两种开重味的重强子进行了数值计算,预言双粲重子的质量为$ M(Ξ_{cc})=3.604$ GeV,$ M(Ξ_{cc}^{\ast })=3.714$ GeV,奇异等单线态四夸克$ud\bar{s}\bar{c}$和$J^{P}=0^{+}$的质量为$ M\left( ud\bar{s}\bar{c},0^{+}\right) =2.934$ GeV.对于奇异标量四夸克$nn\bar{s}\bar{c}$,色磁相互作用引起的态混合是相当大的。

英文摘要:

In this work, we compute masses and magnetic moments of the heavy baryons and tetraquarks with one and two open heavy flavors in a unified framework of MIT bag model. Using the parameters of MIT bag model, we confirm that an extra binding energy, which is supposed to exist between heavy quarks ($c$ and $b$) and between heavy and strange quarks in literatures, is required to reconcile light hadrons with heavy hadrons. Numerical calculations are made for all light mesons, heavy hadrons with one and two open heavy flavors, predicting the masses of doubly charmed baryons to be $ M(Ξ_{cc})=3.604$ GeV, $ M(Ξ_{cc}^{\ast })=3.714$ GeV, and that of the strange isosinglet tetraquark $ud\bar{s}\bar{c}$ with $J^{P}=0^{+}$ to be $ M\left( ud\bar{s}\bar{c},0^{+}\right) =2.934$ GeV. The state mixing due to chromomagnetic interaction is shown to be sizable for the strange scalar tetraquark $nn\bar{s}\bar{c}$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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