具有极化可观量的超子的弱准弹性电产生
Weak quasielastic electroproduction of hyperons with polarization observables
摘要：
随着高亮度电子束在加速器上的应用，现在有可能研究质子的弱准弹性超子产生，即$e^-p \to ν_e Y(Y=Λ,Σ^0)$，这将使在奇异度扇区的高$ Q^2$下确定核子-超子矢量和轴矢量跃迁形状因子成为可能，并为Cabibbo模型、G-不变性、CVC、PCAC假设和SU（3）对称性提供检验。本文研究了末态超子（$ Λ$和$Σ^0$）的全截面、微分截面以及极化的纵向和垂直分量，给出了这些观测量及其对跃迁形状因子的敏感性的数值结果。
英文摘要：
With the availability of high luminosity electron beam at the accelerators, there is now the possibility of studying weak quasielastic hyperon production off the proton, i.e. $e^-p \to ν_e Y(Y=Λ,Σ^0)$, which will enable the determination of the nucleon-hyperon vector and axial-vector transition form factors at high $ Q^2$ in the strangeness sector and provide test of the Cabibbo model, G-invariance, CVC, PCAC hypotheses and SU(3) symmetry. In this work, we have studied the total cross section, differential cross section as well as the longitudinal and perpendicular components of polarization of the final hyperons ($ Λ$ and $Σ^0$ produced in these reactions) and presented numerical results for these observables and their sensitivity to the transition form factors.
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