AAfrag 2.01: interpolation routines for Monte Carlo results on secondary production including light antinuclei in hadronic interactions

Light antinuclei, like antideuteron and antihelium-3, are ideal probes for new, exotic physics because their astrophysical backgrounds are suppressed at low energies. In order to exploit fully the inherent discovery potential of light antinuclei, a reliable description of their production cross sections in cosmic ray interactions is crucial. We provide therefore the cross sections of antideuteron and antihelium-3 production in pp, pHe, Hep, HeHe, p¯p and p¯He collisions at energies relevant for secondary production in the Milky Way, in a tabulated form which is convinient to use. These predictions are based on QGSJET-II-04m and the state of the art coalescence model WiFunC, which evaluates the coalesence probability on an event-by-event basis, including both momentum correlations and the dependence on the emission volume. In addition, we comment on the importance of a Monte Carlo description of the antideuteron production and on the use of event generators in general. In particular, we discuss the effect of two-particle momentum correlations provided by Monte Carlo event generators on antinuclei production.轻反原子核（light antinuclei）如反氘核（antideuteron）与反氦-3（antihelium-3），是探索新奇物理的理想探针，因其在低能段的天体物理本征背景受到显著抑制。为充分挖掘轻反原子核固有的发现潜力，精准描述其在宇宙线相互作用中的产生截面至关重要。为此，我们以便捷易用的表格形式，给出了银河系次级产生相关能区下，pp、pHe、Hep、HeHe、p¯p与p¯He碰撞中反氘核及反氦-3的产生截面。本预测基于QGSJET-II-04m模型与当前最先进的聚合模型（coalescence model）WiFunC，后者可逐事件计算聚合概率，同时纳入动量关联与发射体积的依赖关系。此外，我们还探讨了反氘核产生的蒙特卡洛（Monte Carlo）描述的重要性，以及事件生成器（event generators）的一般性应用原则。特别地，我们分析了蒙特卡洛事件生成器所提供的双粒子动量关联对反原子核产生的影响。