偶偶核的K^＋散射

K￣+ Scattering from Even-Even Nuclei

本文对８００ＭｅＶ／ｃＫ＋介子对４Ｈｅ，１２Ｃ，４０Ｃａ，和１２０Ｓｎ核弹性散射进行了非相对论冲量近似计算，其中考虑了核介质内夸克质量密度相关性的影响，这是由求解自洽能隙方程直接得到的。发现引入非常规效应可以解释Ｋ＋核微分裁面理论值的丢失。根据这些计算所选择的几种偶偶核显示出类似的行为，设有明显观察到文献中提出的可能存在的“重新标度”效应的Ａ─相关性。

The elastic scattering of K+ mesons from 4He, 12C,40Ca and 120Sn at 800 MeV/c incident momentum is calculated within the framework of nonrelativistic impulse approximation .and the effects of density dependent in-medium quark mass are introduced directly from the selfconsistent gap equation. Introduction of this unconventional effect is found to be a possible explanation for the missing theoretical K+-nucleus differential cross section. Based on these calculations,the selected even-even nuclei show similar behaviors and the expected A-dependence of 'rescaling' effects suggest in the literature is not observed apparently.