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Corrections to the one-pion exchange amplitudes for the reaction np → pΔ 033

Поправки к амплитудам с однопионным обменом для реакции np → pΔ 033

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Il Nuovo Cimento A (1965-1970)

Summary

A simple modified one-pion exchange model is applied to the analysis of the reaction np → pΔ 033 from 1.39 to 1.90 GeV/c. It is shown that important corrections to the evasive amplitudes can account for the turnover observed in the differential cross-section and rather good fits are obtained. Such corrections do not agree with the prescription known as «poor man’s absorption». The results for the density matrix elements are briefly discussed.

Riassunto

Si applica un semplice modello modificato di scambio di un pione all’analisi della reazione np → pΔ 033 da 1.39 a 1.90 GeV/c. Si mostra che importanti correzioni alle ampiezze evasive possono spiegare il capovolgimento osservato nella sezione d’urto differenziale e si ottengono approssimazioni abbastanza buone. Tali correzioni non sono in accordo con il metodo noto come «poor man’s absorption». Si discutono brevemente i risultati per gli elementi della matrice di densità.

Реэюме

Простая модифицированная модель с однопионным обменом применяется к аналиэу реакции np → pΔ 033 в области от 1.39 до 1.90 ГзB/c. Покаэывается, что сушественные поправки к амплитудам могут общяснить иэменение, наблюденное в дифференциальном поперечном сечении, и получается довольно хорощее соответствие. Вкратце обсуждаются реэультаты, полученные для злементов матрицы плотности.

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  20. It is a pleasure to acknowledge several interesting discussions on the problem of off-mass-shell extrapolations withJ. C. Anjos andD. Lévy.

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Author notes

  1. A. Ferraz de Camargo filho (Fellow)

    Present address: Laboratoire de Physique Théorique et des Hautes Energies, Université Paris VII, Tour 33-43, 1er étage, 2 place Jussieu, 75221, Paris, Cedex 05, France

  2. J. L. Laville

    Present address: Laboratorire de Physique Corpusculaire, Université de Caen, 14000, Caen, France

Authors and Affiliations

  1. Laboratoire de Physiques Théorique et des Hautes Energies, Paris

    A. Ferraz de Camargo filho (Fellow)

  2. Laboratoire de Physique Corpusculaire, Université de Caen, Caen

    J. L. Laville

  3. Coordenação do Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Brazil

    A. Ferraz de Camargo filho (Fellow)

  4. C.N.R.S., France

    J. L. Laville

Authors
  1. A. Ferraz de Camargo filho
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  2. J. L. Laville
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Ferraz de Camargo filho, A., Laville, J.L. Corrections to the one-pion exchange amplitudes for the reaction np → pΔ 033 . Nuov Cim A 43, 669–679 (1978). https://doi.org/10.1007/BF02730351

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  • DOI: https://doi.org/10.1007/BF02730351

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