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Electroproduction of π+ n, π- p andK + Λ,K + 2211; 0 final states above the resonance region

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Zeitschrift für Physik C Particles and Fields

Abstract

The reactionsΣ v p→π+ n,K + Λ,K + ∑ 0 andΣ v n→π+ n were studied at invariant hadronic masses around 2.2. GeV forQ 2=0.06, 0.28, 0.70, and 1.35 GeV2. The main results are: At small |t| the π+ production is dominated by longitudinally polarized photons and can be described by one pion exchange. At low |t| the transverse (π+ n) cross section drops steeply withQ 2, but remains roughly constant forQ 2≧0.5 GeV2. For |t⊢≧0.8 GeV2, (π+ n/dt) is almost independent ofQ 2. The integrated cross section (π+ n) shows a similarQ 2-dependence asσ tot (γ v p) forQ 2≧0.28 GeV2. The ratioσ(π- p)/σ(π+ n) atQ 2=0.70 and 1.35 GeV2 for |t|≧0.6 GeV2 is smaller than in photoproduction and close to 1/4. The ratioσ(K + ∑ 0 decreases steeply withQ 2 following roughly the predictions of the quark-parton model.

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Author notes

  1. G. Grindhammer

    Present address: Max-Planck-Institut für Physik und Astrophysik, D-8000, München

  2. M. Schädlich

    Present address: Alfried Krupp v. Bohlen und Halbach Stiftung, D-4300, Essen

Authors and Affiliations

  1. Deutsches Elektronen-Synchrotron DESY, D-2000, Hamburg 52, Federal Republic of Germany

    P. Brauel, T. Canzler, D. Cords, R. Felst, G. Grindhammer, M. Helm, W. -D. Kollmann, H. Krehbiel & M. Schädlich

  2. II. Institut für Experimentalphysik der Universität Hamburg, Federal Republic of Germany

    P. Brauel, T. Canzler, D. Cords, R. Felst, G. Grindhammer, M. Helm, W. -D. Kollmann, H. Krehbiel & M. Schädlich

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  1. P. Brauel
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Brauel, P., Canzler, T., Cords, D. et al. Electroproduction of π+ n, π- p andK + Λ,K + 2211; 0 final states above the resonance region. Z. Phys. C - Particles and Fields 3, 101–123 (1979). https://doi.org/10.1007/BF01443698

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  • DOI: https://doi.org/10.1007/BF01443698

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