Strangeness production in antiproton annihilation at rest on 3He, 4He and 20Ne

F. Balestra, Yu A. Batusov, G. Bendiscioli, S. Bossolasco, F. O. Breivik, M. P. Bussa, L. Busso, K. M. Danielsen, C. Guaraldo, I. V. Falomkin, L. Fava, L. Ferrero, V. Filippini, A. Haatuft, A. Halsteinslid, T. Jacobsen, E. Lodi Rizzini, A. Maggiora, K. Myklebost, J. M. OlsenD. Panzieri, G. Piragino, G. B. Pontecorvo, A. Rotondi, A. M. Rozhdestvensky, P. Salvini, M. G. Sapozhnikov, S. O. Sørensen, F. Tosello, V. I. Tretyak, A. Venaglioni, A. Zenoni

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

New data are reported on antiproton annihilations at rest with production of Λ and Ks 0, using a streamer chamber with 3He, 4He and 20Ne as gas targets. The data include Λ, Ks 0, ΛKs 0 and Ks 0KS 0 production rates and momentum distributions, π- momentum spectra, mean numbers of charged particles generally and of negatively charged particles separately for different reaction channels. The yields are compared to simple combinatorial calculations based on the extreme assumptions of Λ production via B = 1 or via B = 0 ( K ̄ rescattering) annihilations. Λ and Ks 0 momentum spectra are compared to simple model calculations where B = 0 and B = 1 annihilations with and without final-state interactions are considered. A review of existing data on Λ and Ks 0 production is presented, showing the dependence on the p ̄ momentum and on the mass number of the target.

Lingua originaleInglese
pagine (da-a)415-452
Numero di pagine38
RivistaNuclear Physics A
Volume526
Numero di pubblicazione3-4
DOI
Stato di pubblicazionePubblicato - 1991
Pubblicato esternamente

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