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Non-symmetrized Hyperspherical Harmonics Method for Non-equal Mass Three-Body Systems

机译:等量三体系统的非对称超球谐函数方法

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The non-symmetrized hyperspherical harmonics method for a three-body system, composed by two particles having equal masses, but different from the mass of the third particle, is reviewed and applied to the $^3$H, $^3$He nuclei and $^3_{Lambda}$H hyper-nucleus, seen respectively as $nnp$, $ppn$ and $NNLambda$ three-body systems. The convergence of the method is first tested in order to estimate its accuracy. Then, the difference of binding energy between $^3$H and $^3$He due to the difference of the proton and the neutron masses is studied using several central spin-independent and spin-dependent potentials. Finally, the $^3_{Lambda}$H hypernucleus binding energy is calculated using different $NN$ and $Lambda N$ potential models. The results have been compared with those present in the literature, finding a very nice agreement.
机译:回顾了三体系统的非对称超球谐方法,该方法由质量相等但与第三种粒子质量不同的两个粒子组成,并应用于$ ^ 3 $ H,$ ^ 3 $ He核和$ ^ 3 _ { Lambda} $ H超核,分别视为$ nnp $,$ ppn $和$ NN Lambda $三体系统。首先测试该方法的收敛性以估计其准确性。然后,利用几个中心自旋无关和自旋依赖性势,研究了由于质子和中子质量的差异而导致的$ ^ 3 $ H和$ ^ 3 $ He之间的结合能的差异。最后,使用不同的$ NN $和$ Lambda N $势模型计算$ ^ 3 _ { Lambda} $ H超核结合能。将结果与文献中的结果进行了比较,发现了很好的一致性。

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