Constituent quark masses from modified perturbative QCD
Constituent quark masses from modified perturbative QCD
复制标题
DOI：
10.1007/s100520100879
复制
发表时间：
2002-03
影响因子：
4.4
通讯作者：
A. Oca;M. R. Madrazo
中科院分区：
文献类型：
--
作者：
A. Oca;M. R. Madrazo
本文采用最近提出的一种包含胶子凝聚的修正微扰展开来计算第一近似下夸克和胶子的自能修正。结果预测轻夸克的质量值为核子质量的1/3，d，和随当前质量单调增长的变化。唯一的现象学输入是将其作为唯一参数（定义修改的传播器）的函数进行排序，然后将其固定以给出当前的估计。结果发现轻夸克是受限的，并且这些波段显示出衰减的传播模式，这表明核子和高共振之间稳定性差异很大的一个模型。夸克模式的上述性质与Munczek和Nemirovski先前考虑的类似胶子传播子的完全约束结果不同。另一方面，凝聚态对胶子自能的影响提供了一个快子质量壳，这与QCD中胶子凝聚的Fukuda分析所预测的一致。
A recently proposed modified perturbative expansion for QCD incorporating gluon condensation is employed to evaluate the quark and gluon self-energy corrections in first approximation. The results predict mass values of 1/3 of the nucleon mass for the light quarksu, d, andsand a monotonously growing variation with the current mass. The only phenomenological input is thatis evaluated up to orderas a function of the unique parameterCdefining the modified propagator, and thenCis fixed to give a current estimate of. The light quarksuanddas a result are found to be confined and thes, c, bandtones show damped propagation modes, suggesting a model for the large differences in stability between the nucleons and the higher resonances. The above properties of quark modes diverge from the fully confinement result following from the similar gluon propagator previously considered by Munczek and Nemirovski. On the other hand, the condensate effects on the gluon self-energy furnish a tachyonic mass shell as predicted by the Fukuda analysis of gluon condensation in QCD.