| Autor: |
Brauel, P., Canzler, T., Cords, D., Felst, R., Grindhammer, G., Helm, M., Kollmann, W. -D., Krehbiel, H., Schädlich, M. |
| Zdroj: |
Zeitschrift für Physik C Particles and Fields; June 1979, Vol. 3 Issue: 2 p101-123, 23p |
| Abstrakt: |
The reactionsΣvp→π+n,K+Λ,K+∑0 andΣvn→π+n were studied at invariant hadronic masses around 2.2. GeV forQ2=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 withQ2, but remains roughly constant forQ2≧0.5 GeV2. For |t⊢≧0.8 GeV2, (π+n/dt) is almost independent ofQ2. The integrated cross section (π+n) shows a similarQ2-dependence asσtot (γvp) forQ2≧0.28 GeV2. The ratioσ(π-p)/σ(π+n) atQ2=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 withQ2 following roughly the predictions of the quark-parton model. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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