论文标题
稀释重 - 巴里昂的轻簇混合核物质
Light clusters in dilute heavy-baryon admixed nuclear matter
论文作者
论文摘要
我们在亚饱和密度，非零温度和同义不对称性的情况下研究核物质的组成，在二元中子星星合并，恒星崩溃和低能的重型离子碰撞的条件下。 该构图包括带有质量$ a \ le 4 $的光簇，一个重的核（$ \ isotope [56] {fe} $），$δ$ - 谐振，普力的同位物，以及$λ$ hyperon。核子平均场是根据零范围的密度函数计算的，而Pion-Nucleon相互作用则以手性扰动理论的领先顺序处理。我们表明，随着温度和/或密度的升高，物质的组成从光簇转移到重型baryon占主导地位，过渡发生几乎独立于同义物的大小。我们的发现强调了在天体物理和重离子物理学环境中同时处理光簇和重型重肉的重要性。
We study the composition of nuclear matter at sub-saturation densities, non-zero temperatures, and isospin asymmetry, under the conditions characteristic of binary neutron star mergers, stellar collapse, and low-energy heavy-ion collisions. The composition includes light clusters with mass number $A\le 4$, a heavy nucleus ($\isotope[56]{Fe}$), the $Δ$-resonances, the isotriplet of pions, as well as the $Λ$ hyperon. The nucleonic mean-fields are computed from a zero-range density functional, whereas the pion-nucleon interactions are treated to leading order in chiral perturbation theory. We show that with increasing temperature and/or density the composition of matter shifts from light-cluster to heavy baryon dominated one, the transition taking place nearly independent of the magnitude of the isospin. Our findings highlight the importance of simultaneous treatment of light clusters and heavy baryons in the astrophysical and heavy-ion physics contexts.
