论文标题
QCD的1/n（c）扩展中的baryon四杆力矩
Baryon quadrupole moment in the 1/N(c) expansion of QCD
论文作者
论文摘要
在QCD的1/n（c）膨胀框架中讨论了基态重子的四极矩，其中n（c）是颜色电荷的数量。首先提供理论表达式，假设具有精确的SU（3）风味对称性，然后将对称性破裂的效果解释为线性秩序。可用的实验信息相当稀缺，不允许在理论和实验之间进行详细的比较，因此未确定方法中的自由参数。取而代之的是，即使在存在一阶对称性破坏的情况下，四极矩之间的一些有用的新关系也有效。 1/n（c）扩展的总体预测是非常启发性的。
The quadrupole moments of ground state baryons are discussed in the framework of the 1/N(c) expansion of QCD, where N(c) is the number of color charges. Theoretical expressions are first provided assuming an exact SU(3) flavor symmetry, and then the effects of symmetry breaking are accounted for to linear order. The rather scarce experimental information available does not allow a detailed comparison between theory and experiment, so the free parameters in the approach are not determined. Instead, some useful new relations among quadrupole moments, valid even in the presence of first-order symmetry breaking, are provided. The overall predictions of the 1/N(c) expansion are quite enlightening.
