Production of Slow Protonium in Vacuum

We describe how protonium, the quasi-stable antiproton-proton bound system, has been synthesized following the interaction of antiprotons with the molecular ion H$_2^+$ in a nested Penning trap environment. From a careful analysis of the spatial distributions of antiproton annihilation events in the...

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Detalles Bibliográficos
Autores principales: Zurlo, N., Lodi Rizzini, E., Venturelli, L., Amoretti, Marco, Macri, M., Testera, G., Variola, A., Amsler, Claude, Pruys, H., Regenfus, Christian, Bonomi, Germano, Carraro, C., Lagomarsino, V., Manuzio, G., Cesar, C.L., Charlton, M., Mitchard, D., Jorgensen, L.V., Madsen, Nina A.H., Van der Werf, D.P., Doser, M., Kellerbauer, A., Landua, Rolf, Fontana, Andrea, Genova, P., Montagna, P., Rotondi, Alberto, Funakoshi, R., Hayano, Ryugo S., Posada, L.G., Yamazaki, Y.
Lenguaje:eng
Publicado: 2008
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1007/s10751-007-9529-0
http://cds.cern.ch/record/1081950
Descripción
Sumario:We describe how protonium, the quasi-stable antiproton-proton bound system, has been synthesized following the interaction of antiprotons with the molecular ion H$_2^+$ in a nested Penning trap environment. From a careful analysis of the spatial distributions of antiproton annihilation events in the ATHENA experiment, evidence is presented for protonium production with sub-eV kinetic energies in states around $n$ = 70, with low angular momenta. This work provides a new 2-body system for study using laser spectroscopic techniques.

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