论文标题
研究八位骨重子的轴向电荷的调查
Investigations on the flavor-dependent axial charges of the octet baryons
论文作者
论文摘要
我们已经研究了延伸的手性夸克模型中地面八位位重子的轴向电荷，在该模型中考虑了所有可能的紧凑型五夸克fock组件$ qqq（q \ bar {q}）（q = u，d，d，s）$。假定重子中三个夸克组件之间的过渡耦合是通过$^{3} p_ {0} $机制通过$^{3} $机制的，可以很好地复制质子中的海洋不对称性。八位位室的轴向电荷的数值结果与其他理论方法预测的轴向电荷相当。结果表明，八位骨重子的单线轴向电荷应表明由夸克的旋转产生的总重子旋转，目前型号的范围为$ 0.45-0.75 $。这与晶格QCD和手性扰动理论的预测一致。同样有趣的是，Light Quarks Spin $ΔU$和$λ$ Baryon中的$ΔD$的价值很小但负值，这在传统的三夸克模型中完全消失了。
We have investigated the axial charges of the ground octet baryons within the extended chiral constituent quark model, where all the possible compact five-quark Fock components $qqq(q\bar{q}) (q=u, d, s)$ in the baryons are considered. The transition couplings between the three- and five-quark components in the baryons are assumed to be via the $^{3}P_{0}$ mechanism, which could reproduce the sea asymmetry in proton very well. The numerical results for the flavor-dependent axial charges of the octet baryons are comparable to those predicted by other theoretical approaches. It is shown that the singlet axial charges of the octet baryons, which should indicate total baryons spin arising from the spin of the quarks, fall in the range $0.45-0.75$ in present model. This is in consistent with the predictions by lattice QCD and chiral perturbation theory. It's also very interesting that the light quarks spin $Δu$ and $Δd$ in the $Λ$ baryon are of small but negative values, which exactly vanish in the traditional three-quark model.
