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Paper detail

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 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.

preprint2008arXivOpen access
N. ZurloM. AmorettiC. AmslerG. BonomiC. CarraroC. L. CesarM. CharltonM. DoserA. FontanaR. FunakoshiP. GenovaR. S. HayanoL. V. JorgensenA. KellerbauerV. LagomarsinoR. LanduaE. Lodi RizziniM. Macri'N. MadsenG. ManuzioD. MitchardP. MontagnaL. G. PosadaH. PruysC. RegenfusA. RotondiG. TesteraD. P. van der WerfA. VariolaL. VenturelliY. Yamazaki
hep-ex
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Open access31 authors1 topic
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N. ZurloM. AmorettiC. AmslerG. BonomiC. CarraroC. L. CesarM. CharltonM. DoserA. FontanaR. FunakoshiP. GenovaR. S. HayanoL. V. JorgensenA. KellerbauerV. LagomarsinoR. LanduaE. Lodi RizziniM. Macri'N. MadsenG. ManuzioD. MitchardP. MontagnaL. G. PosadaH. PruysC. RegenfusA. RotondiG. TesteraD. P. van der WerfA. VariolaL. VenturelliY. Yamazaki

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