Summary
In the present paper we analyse in partial-wave amplitudes the reaction: π−+p→K0+Λ0. We first describe a method of calculation like the mean squares method which permits to obtain directly, up to a phase factor, a set of a partial-wave amplitudes from experimental data for angular distribution and polarization. In the second part, we determine the phase factor by assuming the existence of a resonantF 5/2 state and we show the consistence of the assumption with the previous results. The peak of the total cross-section can then be explained by an important decay mode of the third π-nucleon resonance into the K0Λ0 state. We give also some values for the baryon-meson coupling constants: {fx56-1}.
Riassunto
Nel presente articolo si analizza, in ampiezze d’onde parziali la reazione π−+p→→K0+Λ0. Dapprima si descrive un metodo di calcolo simile a quello dei minimi quadrati che permette di ottenere direttamente, a meno di un fattore di fase, un gruppo di ampiezze d’onde parziali dai dati sperimentali sulla distribuzione angolare e la polarizzazione. Nella seconda parte si determina il fattore di fase, supponendo che esista uno stato risonanteF 5/2 e si mostra la concordanza fra questa ipotesi ed i risultati ottenuti precedentemente. Si può poi spiegare il picco della sezione d’urto totale con un importante modo di decadimento della terza risonanza π-nucleone nello stato K0Λ0. Si dànno anche alcuni valori delle costanti d’accoppiamento barione-mesone {fx74-1}.
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The numerical calculations have been performed on the I.B.M. 1620 computer of the « Faculté des Sciences de Bordeaux ».
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Rimpault, M. Partial-wave analysis of the reaction: π−+p→K0+Λ0 . Nuovo Cim 31, 56–74 (1964). https://doi.org/10.1007/BF02731536
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DOI: https://doi.org/10.1007/BF02731536