论文标题
GEANT4 FTF模型描述Na61/Shine协作数据有关PP互动中Strange粒子生产的协作数据
Geant4 FTF Model Description of the NA61/SHINE Collaboration Data on Strange Particle's Production in pp Interactions
论文作者
论文摘要
Na61/Shine协作的最新数据在$ k^{*0} $和$ ϕ $ MESON的包容性发行版中，$ξ^ - $和$ \ bar配给$ {\ rm pp} $ Interactions在$ p_ {lab} $ in 40至158 GEV/c中的$ {\ rm pp} $互动中的生产。正如之前在实验论文中所示的那样，蒙特卡洛模型 - EPOS 1.99，URQMD 3.4和Pythia 6，无法很好地描述数据。在介绍的论文中，在Geant4 FTF模型中分析了颗粒的产率。介子的产量与真空的奇怪夸克 - 易夸克对生产的可能性成正比，并且在给定的夸克 - 夸克内容中形成矢量介子的概率 - $ p_ {vec} $。我们的论文中提出的详细计算表明，对于带有一个奇怪的Quark或Antiquark的介子，可以以$ p_ {vec} $ = 0.6的良好描述以$ p_ {vec} $ = 0.6。对于介子包含奇怪的夸克和奇怪的古夸克，$ p_ {vec} $ = 0.7。对于非震撼夸克和古夸克的组合，$ p_ {vec} $ = 0.5。 $ξ^ - $和$ \ bar耳ξ+$超子的描述需要将diquark碎片函数更改为超子和反式碎屑的特殊处理（重排） - 较低质量的diquark字符串。
The latest data by the NA61/SHINE collaboration on inclusive distributions of $K^{*0}$ and $ϕ$ meson's, $Ξ^-$ and $\bar Ξ^+$ hyperon's production in ${\rm pp}$ interactions at $P_{lab}$ from 40 up to 158 GeV/c are considered. As it was shown before in experimental papers, Monte Carlo models -- EPOS 1.99, UrQMD 3.4 and Pythia 6, cannot describe reasonably well the data. In the presented paper, the yields of the particles are analyzed within the Geant4 FTF model. The meson yields are proportional to the probability of strange quark-antiquark pair production from the vacuum, and the probability to form a vector meson at a given quark-anti-quark content -- $P_{Vec}$. Detailed calculations presented in our paper show that a good description of the data can be reached for $P_{Vec}$ = 0.6 for a meson with one strange quark or antiquark. For a meson contained strange quark and strange antiquark, $P_{Vec}$ = 0.7. For a combination of non-strange quark and antiquark, $P_{Vec}$ = 0.5. The description of the $Ξ^-$ and $\bar Ξ^+$ hyperons requires a change of the diquark fragmentation function into hyperons and a special treatment (rearrangement) of fragmentation of anti-diquark -- diquark strings with low masses.
