Associate K^0 production in p+p collisions at 3.5 GeV: The role of Delta(1232)++

Abstract

An exclusive analysis of the 4-body final states $\mathrm{\Lambda }+\mathrm{p}+{\pi }^{+}+{\mathrm{K}}^0$ and ${\mathrm{\Sigma }}^0+\mathrm{p}+{\pi }^{+}+{\mathrm{K}}^0$ measured with HADES for p+p collisions at a beam kinetic energy of 3.5 GeV is presented. The analysis uses various phase space variables, such as missing mass and invariant mass distributions, in the four particle event selection (p, ${\pi }^{+}$, ${\pi }^{+}$, ${\pi }^{-}$) to find cross sections of the different production channels, contributions of the intermediate resonances ${\mathrm{\Delta }}^{++}$ and $\mathrm{\Sigma }(1385{)}^{+}$ and corresponding angular distributions. A dominant resonant production is seen, where the reaction $\mathrm{\Lambda }+{\mathrm{\Delta }}^{++}+{\mathrm{K}}^0$ has an about ten times higher cross section ($29.45\pm 0.08_{-1.46}^{+1.67}\pm 2.06\mu \mathrm{b}$) than the analogous non-resonant reaction ($2.57\pm 0.02_{-1.98}^{+0.21}\pm 0.18\mu \mathrm{b}$). A similar result is obtained in the corresponding ${\Sigma }^0$ channels with $9.26\pm 0.05_{-0.31}^{+1.41}\pm 0.65\mathrm{mub}$ in the resonant and $1.35\pm 0.02_{-1.35}^{+0.10}\pm 0.09\mu \mathrm{b}$ in the non-resonant reactions.

arXiv comment12 pages, 11 figures

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Cited by in corpus (11)

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• Medium effects in proton-induced $K^0$ production at 3.5 GeV
• Determination of N* amplitudes from associated strangeness production in p+p collisions
• A study of the $KN$-$K^{\ast }N$ coupled systems
• Inclusive Λ production in proton-proton collisions at 3.5 GeV
• Medium effects in $\Lambda K^{+}$ pair production by 2.83 GeV protons on nuclei
• Deconfinement and freezeout boundaries in equilibrium thermal models
• K*(892)+ production in proton-proton collisions at E_beam = 3.5 GeV
• Search for a $\pi \Lambda N-\pi \Sigma N$ dibaryon in [email protected] GeV
• Medium modification of strange hadronic resonances at SIS, RHIC and LHC energies
• Strange Baryonic Resonances and Resonances Coupling to Strange Hadrons at SIS Energies