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Strangeness production in Pontecorvo reactions on deuterium

✍ Scribed by C. Regenfus

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
411 KB
Volume
655
Category
Article
ISSN
0375-9474

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✦ Synopsis

From a K Β° and A enriched data sample the rare Pontecorvo reactions pd-+AK Β° and pd--+EΒ°K Β° were clearly observed for the first time. Analyses for missing K Β° or charged decaying K Β° in the final st~Le show surprisingly similar branching ratios (~ 2 β€’ 10 -6) for both reactions. This rules out a description of these reaction by a two step mechanism and favours strongly a model of a statistically decaying fireball, formed in the annihilation process. From comparison to the channel pd--+wr-open strangeness is found to be produced at a level of 10 %. Additional reactions of the Pontecorvo type were identified where the recoiling baryon is a neutron and the 0 0 meson decays to KsK S.

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