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Evidence For The Production Of Slow Antiprotonic Hydrogen In Vacuum

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arxiv 0708.3717 v1 pith:AYYBFN5Z submitted 2007-08-28 hep-ex

Evidence For The Production Of Slow Antiprotonic Hydrogen In Vacuum

N. Zurlo , M. Amoretti , C. Amsler , G. Bonomi , C. Carraro , C. L. Cesar , M. Charlton , M. Doser
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A. Fontana R. Funakoshi P. Genova R. S. Hayano L. V. Jorgensen A. Kellerbauer V. Lagomarsino R. Landua E. Lodi Rizzini M. Macr\`i N. Madsen G. Manuzio D. Mitchard P. Montagna L. G. Posada H. Pruys C. Regenfus A. Rotondi G. Testera D. P. Van der Werf A. Variola L. Venturelli Y. Yamazaki
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keywords hydrogenantiprotonicevidenceproductionslowanalysisangularannihilation
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We present evidence showing how antiprotonic hydrogen, the quasistable antiproton-proton (pbar-p) bound system, has been synthesized following the interaction of antiprotons with the hydrogen molecular ion (H2+) in a nested Penning trap environment. From a careful analysis of the spatial distributions of antiproton annihilation events, evidence is presented for antiprotonic hydrogen production with sub-eV kinetic energies in states around n=70, and with low angular momenta. The slow antiprotonic hydrogen may be studied using laser spectroscopic techniques.

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