Summary
The interactions of 775 MeV (kinetic energy) π−-mesons in a hydrogen bubble chamber have been studied. Total and partial crosssections have been determined with the following results: σ (total) = (39.0±1.6) mb, σ (elastic)=(14.8±0.7) mb, σ (π− + p → all neutrals) = (9.0 ± 0.5) mb, σ (π− + p = π− + π+ + n) = (9.8 ± 0.5) mb, and σ (π− + p = π− + p + π0) = (4.8 ± 0.3) mb. The elastic-scattering angular distribution has been fitted with a Legendre polynomial series terminated at the fifth order. Various angular and effective-mass distributions of single-π production are presented and discussed in terms of the Olsson-Yodh and O.P.E. models.
Riassunto
Sono presentati i risultati di un esperimento in camera a bolle a idrogeno per lo studio dell’interazione π−-p ad energia cinetica del π incidente di 775 MeV (nel laboratorio). Vengono determinate la sezione d’urto totale e varie sezioni d’urto parziali, che risultano: σ (totale)=(39.0±1.6) mb, σ (elastica)=(14.8±0.7) mb, σ (π− + p → tutte neutre) = (9.0 ± 0.5) mb, σ(π− + p → π− + π+ + n) = (9.8 ± 0.5) mb, e σ(π− + p → π− + p + π) =(4.8 ± 0.3) mb. La sezione d’urto differenziale elastica è rappresentata mediante uno sviluppo in serie di polinomi di Legendre troncato al quinto grado. Vengono presentate varie distribuzioni angolari e di masse effettive della produzione singola di mesoni π, che viene discussa sulla base del modello isobarico di Olsson-Yodh e del modello periferico O.P.E.
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Bertanza, L., Bigi, A., Carrara, R. et al. π−-p interactions at 775 MeV. Nuovo Cimento A (1965-1970) 44, 712–725 (1966). https://doi.org/10.1007/BF02911196
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DOI: https://doi.org/10.1007/BF02911196