Medium effects on spin observables of proton knockout reactions.
Medium effects on spin observables of proton knockout reactions.
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对质子敲除反应的自旋可观测值的中等影响。
DOI：
10.1103/physrevc.51.2646
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Veit
中科院分区：
文献类型：
--
作者：
Krein;Maris;Rodrigues;Veit
本文通过中能准自由质子与极化入射质子的敲除反应，比较对波畸变不敏感的量，研究了束缚核子和介子性质的介质修正。利用核子-核子相互作用的Bonn单玻色子交换模型，研究了准自由质子-质子截面的自旋观测量对核子和介子性质改变的敏感性.提出了一种从（p，2 p）不对称性中提取介质中pp分析功率的方法，该方法表明，与其自由空间值相比，该量减少了。这种减少与原子核中核子和介子的质量和耦合常数的改变有关。这些修改的影响，另一个自旋可观察到的测量在未来进行了讨论。
Medium modifications of the properties of bound nucleons and mesons are investigated by means of intermediate energy quasifree proton knockout reactions with polarized incident protons, by comparison of quantities which are insensitive against wave distortions. The sensitivity of the spin observables of the quasifree proton-proton cross section to modifications of the nucleon and meson properties is studied using the Bonn one-boson exchange model of the nucleon-nucleon interaction. A method proposed to extract the pp analyzing power in medium from the (p, 2p) asymmetries indicates a reduction of this quantity compared to its free space value. This reduction is linked to modifications of masses and coupling constants of the nucleons and mesons in the nucleus. The implications of these modifications for another spin observable to be measured in the future are discussed.