Are Antiprotons Forever?
High Energy Physics - Experiment
2008-11-26 v3 High Energy Physics - Phenomenology
Nuclear Experiment
Nuclear Theory
Abstract
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.
Cite
@article{arxiv.hep-ex/9506015,
title = {Are Antiprotons Forever?},
author = {M. H. Holzscheiter and X. Feng and T. Goldman and N. S. P. King and R. A. Lewis and M. M. Nieto and G. A. Smith},
journal= {arXiv preprint arXiv:hep-ex/9506015},
year = {2008}
}
Comments
12 pages, latex; 4 figures, uufiled. Slightly expanded discussion of expected energy dependence of annihilation cross section and rate, and of estimates of trap pressure, plus minor text improvements