摘要
依据QCD基本性质建立的扩展手征SU(3)夸克模型可以很好地解决轻强子方面的问题,本文将该模型应用到重味领域,通过变分法计算自旋为0和1的基态含单个重味夸克介子D、Ds、B、Bs,与自旋为1/2和3/2的基态含单个重味夸克重子ΛQ、ΣQ、ΩQ、ΞQ(其中Q代表c或b夸克)的质量,得到一些初步的结果.当含单个重味夸克介子质量的数值结果基本符合实验值时,实验上已发现的重味重子ΛQ、ΣQ、ΩQ、Σ*Q、Ω*c质量的理论值与相应实验值和其它理论方法的结论也基本符合,除了ΞQ、Ξc*的计算值偏大;实验上未发现的重味重子Ξ*b,Ω*b质量的理论预测值与其它理论方法所得结果偏差不大.同时,简要分析了强子内部的相互作用.
The extended chiral SU（3） quark model based on the properties of the quantum chro- modynamics（QCD） is very successful in the light hadrons fields,and is applied to the hadrons with singly heavy flavor. The masses of the S=1 and S=0 ground-state mesons D,Ds,B and Bs and the masses of the S=1/2 and S=3/2 ground--state baryons ∧Q,∑Q,ΩQand ЕQ（the Q means c or b quark） are calculated by using the methed of variations,and some interesting results are obtained. With the masses of the mesons fitting the corresponding known experimental data, the calculated re- sults of established baryons ∧Q,∑Q,ΩQ,∑Q^＊ and Ωc^＊ are reasonably consistent with experimental val-ues and conclusions from other theoretical methods, except that the results of ЕQ and Еc^＊ are some-what heavier. The predicted masses of the ground--state baryons Еb^＊ and Ωb^＊ ,which have not been observed before, are obtained now, and they are close to those from other theoretical approaches. Meanwhile,the interactions inside the hadrons are briefly discussed.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第1期17-25,共9页
Journal of Inner Mongolia University：Natural Science Edition
基金
内蒙古自治区自然科学基金(面上)项目(2010MS0101)
