Charged and neutral current production of $\Delta (1236)$
| Autor: | Korner, J. G., Kobayashi, T., Avilez, C. |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1978 |
| Předmět: |
SEXTET [QUARK]
NEUTRAL CURRENT DIFFERENTIAL CROSS SECTION FIELD THEORETICAL MODEL: WEINBERG QUARK: SEXTET BIBLIOGRAPHY CHARGED CURRENT PROPOSED EXPERIMENT DENSITY MATRIX [SPIN] QUARK: QUINTET WEAK INTERACTION: VALIDITY TEST SPIN: DENSITY MATRIX NUMERICAL CALCULATIONS DELTA(1236): NEUTRINOPRODUCTION WEINBERG [FIELD THEORETICAL MODEL] ddc:530 QUINTET [QUARK] WEAK CURRENT [HADRON] MULTIPOLE [MODEL] VALIDITY TEST [WEAK INTERACTION] HADRON: WEAK CURRENT MODEL: MULTIPOLE NEUTRINOPRODUCTION [DELTA(1236)] |
| Zdroj: | Physical review / D 18(9), 3178-3186 (1978). doi:10.1103/PhysRevD.18.3178 |
| DOI: | 10.1103/PhysRevD.18.3178 |
| Popis: | (1978). doi:10.1103/PhysRevD.18.3178 Based on a quark-model approach previously developed by us which employs a q2 continuation in terms of generalized meson-dominance form factors we study the weak production of the isobar Δ(1236). First we demonstrate that our model is in agreement with the Argonne data on charged-current production of the Δ. We then study neutral-current Δ production using four different gauge models, namely, the standard Weinberg-Salam model, a vectorlike model with six quarks, a five-quark model due to Achiman, Koller, and Walsh, and a variant of the Gürsey-Sikivie model. We fine that the results for the differential cross section in the forward region (|q2|≲0.1 GeV2) are very sensitive to the structure of the weak neutral current and suggest that measurements in this region constitute a stringent test of weak-interaction models. We also calculate the density-matrix elements measurable from decay correllations. The density-matrix elements are not so sensitive to the models containing some axial-vector contribution, whereas the vectorlike model shows a behavior quite distinct from the others. |
| Databáze: | OpenAIRE |
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