Measurement of antiproton annihilation on Cu, Ag and Au with emulsion films

Abstract

The characteristics of low energy antiproton annihilations on nuclei (e.g. hadronization and product multiplicities) are not well known, and Monte Carlo simulation packages that use different models provide different descriptions of the annihilation events. In this study, we measured the particle multiplicities resulting from antiproton annihilations on nuclei. The results were compared with predictions obtained using different models in the simulation tools GEANT4 and FLUKA. For this study, we exposed thin targets (Cu, Ag and Au) to a very low energy antiproton beam from CERN's Antiproton Decelerator, exploiting the secondary beamline available in the AEgIS experimental zone. The antiproton annihilation products were detected using emulsion films developed at the Laboratory of High Energy Physics in Bern, where they were analysed at the automatic microscope facility. The fragment multiplicity measured in this study is in good agreement with results obtained with FLUKA simulations for both minimally and heavily ionizing particles.

References in corpus (4)

• Prospects for measuring the gravitational free-fall of antihydrogen with emulsion detectors
• A new application of emulsions to measure the gravitational force on antihydrogen
• Fast 4$\pi$ track reconstruction in nuclear emulsion detectors based on GPU technology
• Detection of low energy antimatter with emulsions

Cited by in corpus (4)

• Synthesis of cold and trappable fully stripped HCI's via antiproton-induced nuclear fragmentation in traps
• Monte-Carlo based performance assessment of ASACUSA's antihydrogen detector
• First Observation of Antiproton Annihilation At Rest on Argon in the LArIAT Experiment
• Annihilation Vertex Reconstruction Algorithm with Single-Layer Timepix4 Detectors