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HK: Fachverband Physik der Hadronen und Kerne

HK 9: Hadron Structure and Spectroscopy 2

HK 9.6: Talk

Monday, March 23, 2015, 16:15–16:30, T/SR25

Hunting for K^*+(892) in 3.5 GeV pp reactions — •Dimitar Mihaylov — For the HADES collaboration — E12, Physics department, TU München — Excellence Cluster “Universe”, Boltzmannstr. 2, 85748 Garching, Germany

The production of the kaon excitation state K^*+(892) has not been previously investigated for pp collisions at energies near to the production threshold. The data provided by the HADES spectrometer for pp collisions at 3.5 GeV provide a great opportunity to investigate this state. This has been achieved by reconstruction of the decay channel K^*+(892)→ K_S⁰π⁺→ π⁺π⁻π⁺ and performing a single differential analysis in the p_T, p_CM, cosθ_CM and rapidity variables.

Apart from extending our current knowledge of the K^*+(892) state, the result of this analysis will serve as a valuable reference for a future analysis of the available pNb data at the same energy, which will focus on investigating pn reactions, scattering reactions inside the nucleus and production of the K^*+(892) through secondary processes (e.g. π N → K^*+Λ).

The analysis of the pp data is in its final stages and preliminary results of the total production cross section, the dominant production channel and spin alignment properties of the K^*+(892) are available.

This work is supported by the Excellence Cluster “Universe”.