论文标题
从低到超相关能量的基本核子核子反应中的强子产生
Hadron production in elementary nucleon-nucleon reactions from low to ultra-relativistic energies
论文作者
论文摘要
与Pythia 8.2相比，我们研究了微观Parton-Hadron-Dynamics（PHSD）运输方法中的$ P+P $，$ P+N $和$ N+N $反应的强子产量。我们讨论了真空（如$ n+n $碰撞中的事件发生器和毕达斯）的“ PHSD曲调”（由事件发生器和毕达斯的事件发生器实现）以及与重型离子碰撞相关的中等修改，从而产生了热和密集的物质。我们比较了强子多重性的激发功能的PhSD和Pythia 8.2（默认版本）以及差异速度$ y $，横向动量$ p_t $和$ x_f $分布在$ p+p $，$ p+n $和$ n+n $ $ n $ n $反应的现有实验范围的反应中， GEV。我们讨论了由于HADRONIC RESCARTERS，讨论了Hadron的生产机制以及最终状态相互作用（FSI）的作用。我们还展示了LHC Energies $ p+p $碰撞中可能的夸克 - 格鲁隆等离子体（QGP）形成对HADRONIC可观测值的影响。我们强调，鉴于实际和即将进行的重型离子实验，为基本反应开发可靠的事件发生器的重要性。
We study the hadron production in $p+p$, $p+n$ and $n+n$ reactions within the microscopic Parton-Hadron-Dynamics (PHSD) transport approach in comparison to PYTHIA 8.2. We discuss the details of the "PHSD tune" of the Lund string model (realized by event generators FRITIOF and PYTHIA) in the vacuum (as in $N+N$ collisions) as well as its in-medium modifications relevant for heavy-ion collisions where a hot and dense matter is produced. We compare the results of PHSD and PYTHIA 8.2 (default version) for the excitation function of hadron multiplicities as well as differential rapidity $y$, transverse momentum $p_T$ and $x_F$ distributions in $p+p$, $p+n$ and $n+n$ reactions with the existing experimental data in the energy range $\sqrt{s_{NN}} = 2.7 - 7000$ GeV. We discuss the production mechanisms of hadrons and the role of final state interactions (FSI) due to the hadronic rescattering. We also show the influence of the possible quark-gluon plasma (QGP) formation on hadronic observables in $p+p$ collisions at LHC energies. We stress the importance of developing a reliable event generator for elementary reactions from low to ultra-relativistic energies in view of actual and upcoming heavy-ion experiments.
