论文标题
质子和抗蛋白质诱导反应中的陌生产生和超核形成
Strangeness production and hypernuclear formation in proton and antiproton induced reactions
论文作者
论文摘要
在微观传输模型中，已经对抗蛋白质和质子胶片碰撞的奇怪颗粒和超缘进行了研究。超子是由抗逆性碰撞和抗蛋白质诱导反应中的抗逆性碰撞和陌生交换过程中产生的。使用合并方法来构建相空间中的主要超缘，并通过蒸发超子，中子，带电的颗粒等来修改统计模型，以描述超碎片的衰减，其中壳效应，结合能量和根平方米 - 平方 - 平方 - 平方液射线受到考虑。发现Hyperon-Nucleon相互作用对免费$λ$的影响，$ξ^{ - } $生产可以忽略不计。但是，具有吸引力的潜力很明显。与$λ$ hyperfragments的产量相比，双重陌生超碎片的产生降低了1 $μb$，而在1-5 gev/c的事件中，在$^{63} $ cu上对$^{63} $ cu的反应中的横截面为0.05-0.1 Mb。光超碎片是在动态碎片过程中形成的。一旦超出超子产生的阈值能量的入射能量，超碎片形成的能量依赖性是弱的。
Strange particles and hyperfragments in collisions of antiprotons and protons on nuclei have been investigated systematically within a microscopic transport model. The hyperons are produced from the annihilation in antibaryon-baryon collisions and strangeness exchange process in antiproton induced reactions. A coalescence approach is used for constructing the primary hyperfragments in phase space and the statistical model is modified for describing the decay of hyperfragments via evaporating hyperon, neutron, charged particles etc, in which the shell effect, binding energy and root-mean-square radii are taken into account. It is found that the influence of the hyperon-nucleon interaction on the free $Λ$ and $Ξ^{-}$ production is negligible. However, the large hyperfragment yields are obvious with the attractive potential. The production of double strangeness hyperfragments are reduced below 1$μb$ in comparison to the yields of $Λ$-hyperfragments with the cross sections of 0.05-0.1 mb in the antiproton induced reactions on $^{63}$Cu at the incident momenta of 1-5 GeV/c. The light hyperfragments are formed in the dynamical fragmentation process. The energy dependence of hyperfragment formation is weak once the incident energy above the threshold energy for the hyperon production.
