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Features of neutron diffraction dissociation in π±n→(pπ−)π± reaction at 5.1 and 9 GeV/c

Особенности дифракционной диссоциации нейтрона в реакции π±n→(pπ−)π± при 5.1 и 9 ГэВ/с

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Il Nuovo Cimento A (1965-1970)

Summary

A comparative study of neutron diffraction in π±n interactions at intermediate energies is reported. The studied slope-mass correlations for the (pπ−) invariant mass are very similar in π±-induced reactions. The samples obtained by selecting events with the |ϕ s |≷90° (azimuthal angle in the (pπ−) helicity frame) present different dynamic characteristics, and nucleon exchange Deck contribution is necessary to interpret the experimental data. The results of this study are very similar to the ones obtained in the other nucleon diffraction reactions at very high energies (Serpukov, Fermilab, ISR).

Riassunto

Si riporta uno studio comparativo sulla diffrazione del neutrone in interazioni π±n a energie intermedie. Le correlazioni pendenza-massa (per la massa invariante (pπ−)) hanno lo stesso andamento in entrambe le interazioni studiate. Gli eventi selezionati, richiedendo |ϕ s |≷90° (angolo azimutale nel sistema elicità del (pπ−)), presentano differenti caratteristiche dinamiche e un contributo di scambio di nucleone alla Decke è necessario per interpretare l'andamento dei dati sperimentali. I risultati di questo studio sono molto simili, a quelli ottenuti in altre reazioni diffrattive del nucleone ad alte energie (Serpukov, Fermilab, ISR).

Резюме

Приводятся результаты сравнительного анализа дифракционной диссоциации нейтрона в процессах (pπ−) взаимодействий при промежуточных энергиях. Исследованные корреляции для |ϕ s |≷90° инвариантных масс очень сходны с корреляциями в реакциях, индуцированных (pπ−), Образцы, полученные путем отбора событий с (pπ−) (азимутальный угол в (pπ−) систэме), обнаууживают различные динамические характеристики. Для интерпретации экспериментальных данных необходим вклад нуклонного обмена Дека. Результаты проведенного исследования аналогичны результатам, полученным в других дифракционных реакциях на нуклонах при очень высоких энергиях (Серпухов, лаборатория ферми, ISR).

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Authors and Affiliations

  1. Istituto di Fisica dell'Università, Bari, Italia

    N. Armenise, M. T. Muciaccia-Fogli & V. Picciarelli

  2. Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italia

    N. Armenise, M. T. Muciaccia-Fogli & V. Picciarelli

  3. L.P.N.H.E., Université Pierre et Marie Curie, Laboratoire associé à l' IN2P3, France

    M. Baubillier, N. B. Durusoy & M. Rivoal

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  1. N. Armenise
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  2. M. T. Muciaccia-Fogli
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  3. V. Picciarelli
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  4. M. Baubillier
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  5. N. B. Durusoy
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  6. M. Rivoal
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Armenise, N., Muciaccia-Fogli, M.T., Picciarelli, V. et al. Features of neutron diffraction dissociation in π±n→(pπ−)π± reaction at 5.1 and 9 GeV/c. Nuov Cim A 40, 205–216 (1977). https://doi.org/10.1007/BF02776787

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  • DOI: https://doi.org/10.1007/BF02776787

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