论文标题
在$ pp $碰撞中生产动态结合及其在地球附近宇宙射线中的磁通
Production of light antinuclei in $pp$ collisions by dynamical coalescence and their fluxes in cosmic rays near earth
论文作者
论文摘要
光反核的产量是在多相传输模型（AMPT）与动态结合模型结合使用的。调整了该模型以重现$ pp $碰撞在$ \ rm \ sqrt {s} $ = 7.7 GEV到7 tev的横向动量和速度分布。通过应用广泛使用的宇宙射线传播模型，估计地球附近的抗核通量在广泛的动能范围内。我们对抗抑郁通量的结果与文献中的计算一致，而我们对抗33通量的上限则位于该场中的计算之间，该计算范围跨越了其值的数量级。这项研究表明，通过更多的基于地面的实验和模型模拟，可以改善对次级抗3通量的进一步准确估计。最重要的是，我们来自HADRONIC来源的反核背景的价值远低于AMS-02的预计灵敏度，并在5年的整合时间中远低于AMS-02的敏感性，这支持了通过在接下来的十年中测量光反核心来搜索新物理的想法。
Light antinucleus yields are calculated in a multiphase transport model (AMPT) coupled with a dynamical coalescence model. The model is tuned to reproduce the transverse momentum and rapidity distributions of antiproton in $pp$ collisions at $\rm \sqrt{s}$ = 7.7 GeV to 7 TeV. By applying a widely used cosmic ray propagation model, the antinucleus fluxes near the earth are estimated over a broad range of kinetic energies. Our result on the antideuteron flux is consistent with the calculations in the literature, while our upper limit on the antihelium-3 flux sits in-between calculations in the field that span an order of magnitude in its value. This study suggests that further accurate estimation of secondary antihelium-3 flux could be improved with more ground-based experiments and model simulations. Most importantly, our value of antinucleus background from hadronic source is far below the projected sensitivity of AMS-02 with 5 years of integration time, which supports the idea of searching for new physics by measurements of light antinuclei in upcoming decade.
