论文标题
冷中子物质中单个α粒子的准粒子特性
Quasiparticle properties of a single alpha particle in cold neutron matter
论文作者
论文摘要
预测在中等能源重型离子碰撞和质子恒星中遇到的热核物质中，诸如α颗粒和杜特隆之类的光簇会发生。为了检查此类光簇的中等性能，我们考虑了一个简化的系统，其中像杂质一样，将单个α粒子嵌入到零温度，稀释的非相互作用中子的稀释气中。通过采用非舒张梯子近似，以在杂质和气体之间有效相互作用，这通常用于在超电原子的气体中分析费米极性，我们计算了杂质的准粒子特性，即能量移位，有效质量，有效的质量，quasiparticle质量，quasiparticles bistue和抑制速率。
Light clusters such as alpha particles and deuterons are predicted to occur in hot nuclear matter as encountered in intermediate-energy heavy-ion collisions and protoneutron stars. To examine the in-medium properties of such light clusters, we consider a much simplified system in which like an impurity, a single alpha particle is embedded in a zero-temperature, dilute gas of non-interacting neutrons. By adopting a non-selfconsistent ladder approximation for the effective interaction between the impurity and the gas, which is often used for analyses of Fermi polarons in a gas of ultracold atoms, we calculate the quasiparticle properties of the impurity, i.e., the energy shift, effective mass, quasiparticle residue, and damping rate.
