Discovery of antiproton trapping by long-lived metastable states in liquid helium

2 September 1991

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 67 (10) , 1246-1249
https://doi.org/10.1103/physrevlett.67.1246

Abstract

Delayed annihilation of antiprotons stopped in liquid helium has been observed, revealing that about 3.6% of stopped antiprotons are trapped in long-lived metastable states. No delayed component was found either in liquid nitrogen or in liquid argon. The observed time distribution of delayed annihilation shows fast-decaying components followed by a major part with a decay time constant of 3 μsec.

Keywords

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