High Energy Hadronic Interactions and the Puzzles of the Cosmic Radiation

高能强子相互作用和宇宙辐射之谜

• 批准号: 465275045
• 负责人: Dr. Sergey Ostapchenko, Ph.D.
• 金额: --
• 依托单位: Department of Physics
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/465275045?language=en
• 关键词: Energy; Hadronic; Interactions; Puzzles; Cosmic

Progress in high energy astrophysics usually requires an improved understanding of particle production processes in various high energy reactions. In the framework of the project, novel theoretical approaches to the treatment of various aspects of hadronic interactions will be applied to challenging problems of high energy astrophysics, related to investigations of ultra-high energy cosmic rays (UHECRs), measurements of high energy neutrino fluxes, and a detection of extraterrestrial fluxes of antinuclei. In particular, it is planned to analyze the nuclear composition of UHECRs, based on experimental data of giant air shower arrays, and to discriminate thereby between various models for the UHECR origin, using the new QGSJET-III Monte Carlo generator of hadronic interactions and critically assessing the uncertainties of the model predictions. The second research goal is to calculate the atmospheric neutrino background, including the prompt neutrino contribution, using a new approach for the description of the intrinsic charm content of the proton. The obtained results will be applied for a more precise determination of the astrophysical neutrino flux, based on the data of the IceCube observatory, notably, in the most physically interesting PeV energy range corresponding to the cutoff of the observed neutrino spectrum. The third major goal of the project is to obtain maximally constrained predictions for the fluxes of antinuclei from cosmic ray interactions with the interstellar medium and from other astrophysical sources.

高能天体物理学的进步通常需要对各种高能反应中的粒子产生过程有更好的理解。在该项目的框架内，处理强子相互作用各个方面的新的理论方法将被应用于高能天体物理的挑战性问题，这些问题涉及超高能宇宙射线的研究、高能中微子通量的测量以及对地外反核通量的探测。特别是，计划利用新的QGSJET-III强子相互作用蒙特卡罗产生器，根据巨型空气簇射阵列的实验数据，分析超高电子回旋加速器的核组成，从而区分超高回旋加速器起源的各种模型，并严格评估模型预测的不确定性。第二个研究目标是使用一种新的方法来描述质子的内在魅力含量，计算包括瞬发中微子贡献在内的大气中微子背景。所获得的结果将用于根据冰立方天文台的数据，特别是在与观测到的中微子谱截断相对应的最有物理意义的PeV能量范围内的数据，更精确地确定天体物理中微子通量。该项目的第三个主要目标是从宇宙线与星际介质的相互作用和从其他天体物理来源获得对反核通量的最大限制预测。