Are Antiprotons Forever?

Details Are Antiprotons Forever? Are Antiprotons Forever?

1995-06-29

arxiv.org/abs/hep-ex/9506015v3

Phys.Lett.A214:279,1996

Physics

High Energy Physics

High Energy Physics - Experiment

12 pages, latex; 4 figures, uufiled. Slightly expanded discussion of expected energy dependence of annihilation cross section

Scientific paper

10.1016/0375-9601(96)00189-2

Up to one million antiprotons from a single LEAR spill have been captured in a large Penning trap. Surprisingly, when the antiprotons are cooled to energies significantly below 1 eV, the annihilation rate falls below background. Thus, very long storage times for antiprotons have been demonstrated in the trap, even at the compromised vacuum conditions imposed by the experimental set up. The significance for future ultra-low energy experiments, including portable antiproton traps, is discussed.

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