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

Author(s)

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

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.

Organisation(s)

Isotope Physics

External organisation(s)

Österreichische Akademie der Wissenschaften (ÖAW), Ulmer Fundamental Symmetries Laboratory, European Organization for Nuclear Research (CERN), Università degli Studi di Brescia, Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Pavia, Politecnico di Milano, Istituto Nazionale di Fisica Nucleare (INFN), Milano, University College London, Data Technology, University of Tokyo, Università degli Studi di Milano-Bicocca, Japan Synchrotron Radiation Research Institute, NIKHEF-Nationaal instituut voor subatomaire fysica

Journal

European Physical Journal A

Volume

60

No. of pages

18

ISSN

1434-6001

DOI

https://doi.org/10.1140/epja/s10050-024-01428-x

Publication date

11-2024

Peer reviewed

Yes

Austrian Fields of Science 2012

103014 Nuclear physics

ASJC Scopus subject areas

Nuclear and High Energy Physics

Portal url

https://ucrisportal.univie.ac.at/en/publications/a4df48c6-6fe9-4666-9120-ba5c28609f13