论文标题
在$^{12} {\ rm c}（\ vec {e}，{e}'\ vec {p}）$过程中的$^{12} {\ rm c}中的后坐极化的比较
Comparison of recoil polarization in the $^{12}{\rm C}(\vec{e},{e}'\vec{p})$ process for protons extracted from $s$ and $p$ shell
论文作者
论文摘要
我们提出了两倍转移组件的双比率$（p^{\ prime} _ {\！x} \！/ p^{\ prime} _ {\！z} _p/（p^{\ prime} _ { $ s $和$ p $ shell的固定质子在$^{12} {\ rm c} $中，由$^{12} {\ rm c}（\ vec {e}，{e}'\ vec {e}'\ vec {p} \，）$反应在quasi-elastic kinematics中的反应。将数据与相对论失真波冲动近似中的理论预测进行了比较。我们的结果表明，当比较以相同的质子虚拟性进行比较时，在相同初始动量（缺失动量）比较时观察到的$ s $ - 和$ p $ - 壳质子之间的差异在很大程度上消失了。尽管各自的核密度存在很大差异，但我们观察到质子的密度依赖性介质修改没有相同的虚拟性。
We present first measurements of the double ratio of the polarization transfer components $(P^{\prime}_{\!x} \!/ P^{\prime}_{\!z} )_p/ (P^{\prime}_{\!x} \!/ P^{\prime}_{\!z} )_s$ for knock-out protons from $s$ and $p$ shells in $^{12}{\rm C}$ measured by the $^{12}{\rm C}(\vec{e},{e}'\vec{p}\,)$ reaction in quasi-elastic kinematics. The data are compared to theoretical predictions in relativistic distorted-wave impulse approximation. Our results show that differences between $s$- and $p$-shell protons, observed when compared at the same initial momentum (missing momentum) largely disappear when the comparison is done at the same proton virtuality. We observe no density-dependent medium modifications for protons from $s$ and $p$ shells with the same virtuality in spite of the large differences in the respective nuclear densities.
