Hypernuclei in some hammer-like events recorded in a photonuclear emulsion irradiated with stopping Kk mesons

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Abstract

In a nuclear emulsion stack exposed to K -mesons a total of 675 events were found in which incident stopping particles interacted with emulsion nuclei to produce the 8Li or 8B nuclei (hammer-like events). It was established that 70% of the events pertain to the K -meson interaction, while 18.25% belong to the stopping π-meson interaction. Comparing these productions it has been found that in about 5% of events π0-meson hypernuclei occur in hammer-like events produced by stopping K -mesons.

Data are reported on one case of a π -mesonic hypernucleus decaying in such a way that, in addition to the emission of a π -meson, a hammer-like event is produced, i.e. two short-range particles and an electron are emitted. This event may be ascribed to the decay of a λ5Li hypernucleus.

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This paper was read at the 9th International Conference on Solid State Nuclear Track Detectors, Neuherberg/München, September 30 – October 6, 1976.

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