Production and Dalitz decays of baryon resonances in proton-proton interaction = 3.16 GeV with HADES
20135 pages
Published in:
- J.Phys.Conf.Ser. 426 (2013) 012015
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Abstract: (IOP)
One of the physics goals of HADES is to investigate spectral modifications of light vector mesons in strongly interacting matter via their dielectron (e(+)e(−)) decay channel. Theoretical models predict such modifications due to strong meson-baryon resonance coupling which can be also probed in elementary collisions. In 2007 electron-positron pair production has been measured in p+p reactions at a beam kinetic energy of 3.5 GeV. We present analysis results of the exclusive channels ppπ(0), pnπ(+), ppe(+)e(−), which indicate contributions of higher resonances. In order to estimate production cross sections of the baryonic resonances, the results have been compared to Monte Carlo calculations based on a resonance model assuming an incoherent sum of various four-star resonances. To obtain the corresponding e(+)e(−) yields, two models of the width parametrization are applied in the simulation.- p p: exclusive reaction
- pi: hadroproduction
- electron: pair production
- baryon resonance: decay
- cross section
- experimental results
- HADES
- Darmstadt SIS
- p p --> 2p pi
- p p --> 2p positron electron
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