修改的Skyrme模型中转动与振动的耦合对重子性质的影响  

Influence of rotational-vibrational coulping about nucleon static properties in modified Skyrme model

作　　者：丁霞[1] 牛卫国[1] 林进虎[2] 

机构地区：[1]青岛科技大学数理系,山东青岛266042 [2]延边大学理工学院物理系,吉林延吉133002

出　　处：《延边大学学报（自然科学版）》2005年第1期27-30,共4页Journal of Yanbian University（Natural Science Edition）

摘　　要：研究了一个改进的Skyrme模型,在重子数守恒的新的标度变换下,同时考虑孤立子的转动与振动耦合,通过最低阶半经典近似处理,推出了包括振动与转动耦合在内的与标度参数有关的孤立子哈密顿,由N、Δ能级分裂公式推出了理论参数fπ和m,并且计算了核子的静态性质.计算结果与原先的Skyrme模型的预言相比,绝大部分数据有了改进,其结果基本符合于实验值.We studied a modified Skyrme model. At the same time, we have considered (rotational)-vibrational coulping under the new baryon-number-preserving scaling transformation. The soliton hamiltonian with rotational-vibrational coulping about to scaling was deduced by the limitations of a semiclassical approximation. Then, the nucleon-Δ energy level split formula was obtained and the theoretical parameters f_π,m were fixed. Our results that the static properties of nucleons compared to that Skyrme have predicted that the most of the oretical values were improved and closed to experimental value.

关 键 词：SKYRME模型 标度变换 转动与振动耦合 能级分裂 

分 类 号：O572.2[理学—粒子物理与原子核物理]