Antiproton annihilation at rest in thin solid targets and comparison with Monte Carlo simulations

IF 2.6 3区物理与天体物理 Q2 PHYSICS, NUCLEAR The European Physical Journal A Pub Date : 2024-11-17 DOI:10.1140/epja/s10050-024-01428-x

C. Amsler, H. Breuker, M. Bumbar, M. Cerwenka, G. Costantini, R. Ferragut, M. Fleck, M. Giammarchi, A. Gligorova, G. Gosta, E. D. Hunter, C. Killian, B. Kolbinger, V. Kraxberger, N. Kuroda, M. Lackner, M. Leali, G. Maero, V. Mascagna, Y. Matsuda, S. Migliorati, D. J. Murtagh, A. Nanda, L. Nowak, S. Rheinfrank, M. Romé, M. C. Simon, M. Tajima, V. Toso, S. Ulmer, M. van Beuzekom, L. Venturelli, A. Weiser, E. Widmann, Y. Yamazaki, J. Zmeskal

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Abstract

The mechanism of antiproton–nucleus annihilation at rest is not fully understood, despite substantial previous experimental and theoretical work. In this study we used slow extracted antiprotons from the ASACUSA apparatus at CERN to measure the charged particle multiplicities and their energy deposits from antiproton annihilations at rest on three different nuclei: carbon, molybdenum and gold. The results are compared with predictions from different models in the simulation tools Geant4 and FLUKA. A model that accounts for all the observed features is still missing, as well as measurements at low energies, to validate such models.

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固体薄靶中反质子静止湮灭以及与蒙特卡罗模拟的比较

尽管之前进行了大量的实验和理论研究，但人们对反质子-原子核静止湮灭的机理还不完全清楚。在这项研究中，我们利用欧洲核子研究中心 ASACUSA 仪器中缓慢提取的反质子，测量了三种不同原子核（碳、钼和金）静止时反质子湮灭产生的带电粒子倍率及其能量沉积。测量结果与 Geant4 和 FLUKA 模拟工具中不同模型的预测结果进行了比较。目前还缺少一个能解释所有观测到的特征的模型，也缺少低能下的测量结果来验证这些模型。

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来源期刊

The European Physical Journal A 物理-物理：核物理

CiteScore

5.00

自引率

18.50%

发文量

216

审稿时长

3-8 weeks

期刊介绍： Hadron Physics Hadron Structure Hadron Spectroscopy Hadronic and Electroweak Interactions of Hadrons Nonperturbative Approaches to QCD Phenomenological Approaches to Hadron Physics Nuclear and Quark Matter Heavy-Ion Collisions Phase Diagram of the Strong Interaction Hard Probes Quark-Gluon Plasma and Hadronic Matter Relativistic Transport and Hydrodynamics Compact Stars Nuclear Physics Nuclear Structure and Reactions Few-Body Systems Radioactive Beams Electroweak Interactions Nuclear Astrophysics Article Categories Letters (Open Access) Regular Articles New Tools and Techniques Reviews.

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