| We present measurements of exclusive p+,0Unknown control sequence '\ensuremath' and h production in pp reactions at 1.25GeV and 2.2GeV beam kinetic energy in hadron and dielectron channels. In the case of p++ and p00 , high-statistics invariant-mass and angular distributions are obtained within the HADES acceptance as well as acceptance-corrected distributions, which are compared to a resonance model. The sensitivity of the data to the yield and production angular distribution of D(1232) and higher-lying baryon resonances is shown, and an improved parameterization is proposed. The extracted cross-sections are of special interest in the case of pp ® pp h , since controversial data exist at 2.0GeV; we find s = 0.142±0.022Unknown control sequence '\ensuremath' mb. Using the dielectron channels, the p00 and h Dalitz decay signals are reconstructed with yields fully consistent with the hadronic channels. The electron invariant masses and acceptance-corrected helicity angle distributions are found in good agreement with model predictions. |
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