Towards a Study of Low Energy Antiproton Annihilations on Nuclei
Abstract
A study of antiproton annihilations at rest on thin solid targets is underway at the ASACUSA facility, which now features a dedicated beam line for slow extraction at 250 eV. The experiment will employ new technologies, such as the Timepix4 ASICs coupled to silicon sensors, to measure the total multiplicity, energy, and angular distribution of various prongs produced in thin solid targets. A detection system consisting of seven Timepix4, covering most of the solid angle, is being constructed. A 3D annihilation vertex reconstruction algorithm from particle tracks in the single-plane detectors has been developed using Monte Carlo simulations. The measurements will enable a study of pbar-nucleus interactions, their dependence on nucleus mass and branching ratios. The results will be used to assess and potentially improve various simulation models.
Keywords
Cite
@article{arxiv.2503.04868,
title = {Towards a Study of Low Energy Antiproton Annihilations on Nuclei},
author = {Viktoria Kraxberger and Marcus Bumbar and Angela Gligorova and Claude Amsler and Matias Bayo and Horst Breuker and Matti Cerwenka and Giovanni Costantini and Rafael Ferragut and Marco Giammarchi and Giulia Gosta and Hiroyuki Higaki and Eric D. Hunter and Carina Killian and Naofumi Kuroda and Marco Leali and Giancarlo Maero and Chloe Malbrunot and Valerio Mascagna and Yasuyuki Matsuda and Stefano Migliorati and Daniel Murtagh and Amit Nanda and Lilian Nowak and Massimiliano Romé and Martin C. Simon and Minori Tajima and Valerio Toso and Stefan Ulmer and Luca Venturelli and Alina Weiser and Eberhard Widmann and Yasunori Yamazaki},
journal= {arXiv preprint arXiv:2503.04868},
year = {2025}
}
Comments
Submitted to PoS, Proceedings for the International Conference on Exotic Atoms and Related Topics and Conference on Low Energy Antiprotons, EXA/LEAP2024