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arXiv 1406.4604nucl-thnucl-ex
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λ超核低能谱的微观粒子转子模型

Microscopic particle-rotor model for low-lying spectrum of Lambda hypernuclei

H. Mei, K. Hagino, J. M. Yao, T. Motoba

摘要:

提出了一种基于粒子转子模型的超核低激发态计算方法,该方法将超子与核心核的低激发态耦合,从而构造出超核态.与传统的粒子转子模型相比,我们采用了一种微观的方法,即生成坐标法(GCM)与粒子数和角动量投影的核心状态。我们将这种微观粒子转子模型应用于$^9_Λ$ Be,采用相对论平均场拉格朗日的点耦合版本。一个合理的协议与低自旋光谱的实验数据是使用$ΛN$耦合强度确定重现的$Λ$粒子的结合能。

英文摘要:

We propose a novel method for low-lying states of hypernuclei based on the particle-rotor model, in which hypernuclear states are constructed by coupling the hyperon to low-lying states of the core nucleus. In contrast to the conventional particle-rotor model, we employ a microscopic approach for the core states, that is, the generator coordinate method (GCM) with the particle number and angular momentum projections. We apply this microscopic particle-rotor model to $^9_Λ$Be employing a point-coupling version of the relativistic mean-field Lagrangian. A reasonable agreement with the experimental data for the low-spin spectrum is achieved using the $ΛN$ coupling strengths determined to reproduce the binding energy of the $Λ$ particle.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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