Q -balls of clusterized baryonic matter
Q -balls of clusterized baryonic matter
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Q-簇状重子物质球
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
W. Greiner
中科院分区：
文献类型：
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作者：
Ş. Mişicu;I. Mishustin;W. Greiner
用相对论平均场（RMF）模型研究了由核子和α-粒子组成的重子物质的性质。描述α-粒子的相对论场φ的拉格朗日也允许包含自相互作用项。采用各种类型的RMF参数来计算嵌入重子物质中的α-粒子的能量。我们首先考虑含有少量α-粒子的重子系统，并计算了能量谱作为重子密度的函数。然后我们转向纯α-物质的情况，再次推导出能谱，这一次是α-粒子密度的函数，有和没有四次自相互作用。在论文的第二部分，我们重点研究了线性σ和ω场和非线性（四次+六次）自相互作用的φ场的情况下，由重子α-粒子形成的电荷中和q球的基态性质（每粒子能量，由α-粒子组成的球状块的半径）。
Properties of baryonic matter made of nucleons and α-particles are studied within a relativistic mean-field (RMF) model. The Lagrangian describing the relativistic field ϕ of α-particles is allowed to contain also self-interaction terms. Various types of RMF parametrizations are employed to calculate the energy of α-particles embedded in the baryonic matter. We first consider baryonic systems with small admixtures of α-particles and calculate the energy spectrum as a function of baryon density. Then we turn to the case of pure α-matter and derive once again the energy spectrum, this time as a function of α-particle density, with and without quartic self-interaction. In the second part of the paper, we focus on the ground-state properties (energy per particle, radii of the spherical lumps made of α-particles) of charge neutralized Q-balls formed of baryonic α-particles for the case of linear σ and ω fields and nonlinear (quartic+sextic) self-interactions of the ϕ field.