Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 60: Hadronenstruktur und -spektroskopie
HK 60.6: Vortrag
Freitag, 21. März 2014, 15:30–15:45, HZ 3
Exclusive Measurement of Resonance Productions associated with Strangeness in pp@3.5 GeV* — •Jia-Chii Berger-Chen for the HADES collaboration — TU München, Boltzmannstr. 2, 85748 Garching, Germany
A detailed understanding of p+p reactions has a great importance for the study of p+A and also heavy ion collisions, where with increased nuclear density in-medium modifications of hadrons are expected. For that reason exclusive cross sections and studies of exclusive kinematics in p+p reactions are necessary. Especially, the ability to distinguish resonant from non-resonant productions will help in the understanding of underlying kinematics. A dedicated analysis has been performed on the p+p data measured at 3.5 GeV with the HADES experiment (GSI, Darmstadt, Germany). We concentrate on the study of the reactions p+p→ Y+p+π++K0 (Y = Λ or Σ0), in which an intermediate Δ++ resonance decaying into proton and π+ might be produced. The strength of this analysis is the capability to decompose not only resonant and non-resonant reactions, but also reactions with a Λ from a Σ0 in the final state. Especially because the reaction p+p→Σ0+Δ+++K0 has never been measured before. In this contribution the analysis procedure will be presented as well as the resulting cross sections and obtained kinematic distribtions.
* supported by BMBF, TUM Graduate School, Excellence Cluster “Universe” and Helmholtz VH-NG-330