Skyrme模型中的多重子描述  

Description of Multibaryons and the Skyrme Model

作　　者：汤叔楩[1] 刘升[2] 

机构地区：[1]河北科技大学理学院,河北石家庄050054 [2]河北广播电视大学理工部,河北石家庄050071

出　　处：《河北师范大学学报（自然科学版）》2002年第4期366-371,共6页Journal of Hebei Normal University：Natural Science

摘　　要：在束缚态近似到 SU(3 ) Skyrme模型的范围内 ,讨论低能多重子组态 .用近似拟设表示以有理映射为基础的静态背景场 ,这样的映射有精确解的同样的对称性 .利用这些对称性来确定集体 Hamilton量和波函数的明确形式 ,得到的展开式在精确的情况下同样有效 .用介子结合 ,惯性参数 ,以及超精细分裂常数所做的计算与拟设的具体形式有关 ,所以它们是近似的 ,用这些值计算了 B≤ 9和奇异性 0及 -B的低能谱 .Within the bound state approach to the SU (3) Skyrme model we discuss low lying multibaryon configurations.Approximate anstze are used for the static background fields based on rational maps which have the same symmetries of the exact solutions,and lead to a great simplification in the treatment of the kaon soliton system.The same symmetries as the exact ones is an important property of these approximate configurations.Making use of only these symmetries we can determine the explicite form of the collective Hamiltonians and wave functions.Thus,the expressions obtained are also valid in the exact case.On the other hand,the meson bindings,inertia parameters and hyperfine splitting constants we culculate do depend on the detailed form of the anstze and are therefore approximate.Using these values we discuss the spectra of non strange and strange multibaryons and compute the low lying spectra of multibaryons with B ≤9 and strangeness 0 and - B . With these results the stability of some multilambda configurations is discussed.

关 键 词：多重子 有理映射 SKYRME模型 多skyrmion组态 束缚态近似 HAMILTON量 

分 类 号：O572.34[理学—粒子物理与原子核物理]