论文标题
重型离子碰撞中的茶叶产生和吸收
Pion production and absorption in heavy-ion collisions
论文作者
论文摘要
基于Isospin依赖性运输模型IBUU，在$ AU+AU $ 400 MEV/核的中央碰撞中，对pion的产生及其吸收进行了彻底研究。发现这些培来首先由硬$δ$衰减以平均密度约为$1.75ρ_{0} $产生，而在随后的无弹性碰撞中，大约有18％的人绝对被吸收。对于观察到的自由亲，其中一半以上已经散布了一次或多次，然后才能摆脱物质。乳头的散射数量越多，它们拥有的动量就越高。由于它们在高密度核物质中存在的时间较长，因此这些亲质在高密度下提供了有关核物质的对称能量的更多信息。
Based on the isospin dependent transport model IBUU, the pion production and its absorption are thoroughly studied in the central collision of $Au+Au$ at a beam energy of 400 MeV/nucleon. It is found that the pions are firstly produced by the hard $Δ$ decay at the average density around $1.75ρ_{0}$, whereas about 18\% of them are absorbed absolutely in the subsequent inelastic collisions. For the free pions observed, more than half of them have been scattered for one or more times before they are free from matter. And the more scattering numbers of pions, the higher the momentum they possess. These pions, due to longer time of their existence in high density nuclear matter, carry more information about the symmetry energy of the nuclear matter at high densities.
