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

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 deposi...

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Main Authors Amsler, Claude, Breuker, Horst, Bumbar, Marcus, Cerwenka, Matti, Costantini, Giovanni, Ferragut, Rafael, Fleck, Markus, Giammarchi, Marco, Gligorova, Angela, Gosta, Giulia, Hunter, Eric David, Killian, Carina, Kolbinger, Bernadette, Kraxberger, Viktoria, Kuroda, Naofumi, Lackner, Moritz, Leali, Marco, Maero, Giancarlo, Mascagna, Valerio, Matsuda, Yasuyuki, Migliorati, Stefano, Murtagh, Daniel James, Nanda, Amit, Nowak, Lilian, Rheinfrank, Simon, Romé, Massimiliano, Simon, Martin C, Tajima, Minori, Toso, Valerio, Ulmer, Stefan, van Beuzekom, Martin, Venturelli, Luca, Weiser, Alina, Widmann, Eberhard, Yamazaki, Yasunori, Zmeskal, Johann
Format Journal Article
LanguageEnglish
Published 09.07.2024
Subjects
Physics - Nuclear Experiment
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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.
AbstractList 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.
Author Amsler, Claude
Costantini, Giovanni
Murtagh, Daniel James
Hunter, Eric David
Kolbinger, Bernadette
Toso, Valerio
Bumbar, Marcus
Migliorati, Stefano
Gligorova, Angela
Fleck, Markus
Widmann, Eberhard
Gosta, Giulia
Nowak, Lilian
Breuker, Horst
Romé, Massimiliano
Venturelli, Luca
Giammarchi, Marco
van Beuzekom, Martin
Cerwenka, Matti
Tajima, Minori
Kuroda, Naofumi
Kraxberger, Viktoria
Matsuda, Yasuyuki
Killian, Carina
Leali, Marco
Rheinfrank, Simon
Maero, Giancarlo
Zmeskal, Johann
Ferragut, Rafael
Nanda, Amit
Mascagna, Valerio
Lackner, Moritz
Ulmer, Stefan
Simon, Martin C
Weiser, Alina
Yamazaki, Yasunori
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Title Antiproton annihilation at rest in thin solid targets and comparison with Monte Carlo simulations
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