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Test of quark model predictions in the reactions $\pi^+ p \to \omega \Delta^{++}$ and $\rho^0\Delta^{++}$ at 5 GeV/c

Lyons, L. ; Karshon, U. ; Eisenberg, Y. ; et al.
Nucl.Phys.B 85 (1975) 165-178, 1975.
Inspire Record 1392677 DOI 10.17182/hepdata.32120

The well-known class-A quark-model relations of Białas and Zalewski are parametrised in a particular form, where one can compare the data with the predictions separately for the meson non-flip and flip parts, defined in the transversity frame. A 3-parameter fit to the joint decay angular distribution is performed on the experimental data, and the results are compared with the quark-model predictions for various regions of the four-momentum transfer. The effect of an s -wave state under the ρ 0 is discussed.

1 data table
Table 1

A THREE PARAMETER FIT IS MADE TO THE JOINT DECAY DISTRIBUTION.


Amplitude Analyses of the Reactions pi+ p --> (rho0, omega) Delta++ at 7.1-GeV/c

Owens, J.F. ; Eisner, R.L. ; Chung, S.U. ; et al.
Nucl.Phys.B 112 (1976) 514-544, 1976.
Inspire Record 3423 DOI 10.17182/hepdata.35710

New data are presented, in the form of statistical tensors, for the reactions π + p → ( ϱ 0 , ω ) Δ ++ at 7.1 GeV/ c . Using these data, two types of model-dependent amplitude analyses have been performed. Both analyses, though based on different sets of assumptions, yield results which are in agreement with each other. The structure observed in the magnitudes and phases of the extracted amplitudes is consistent with that expected on the basis of currently accepted phenomenological ideas.

2 data tables
Table 1

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Table 2

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