Search for a $\pi \mathrm{\Lambda }N-\pi \mathrm{\Sigma }N$ dibaryon in p+p@3.5 GeV

This work is dedicated to the search for a $\pi \mathrm{\Lambda }N\text{\hspace{0.17em}⁣}-\text{\hspace{0.17em}⁣}\pi \mathrm{\Sigma }N$ resonance $\mathcal{Y}$ with the quantum numbers ($Y,I,J^P$) = (1,3/2,$2^{+}$). The double charged $\mathrm{\Sigma }(1385)N\text{\hspace{0.17em}⁣}-\text{\hspace{0.17em}⁣}\mathrm{\Delta }(1232)Y$ quasibound state was looked for in the reaction $pp\to {\mathcal{Y}}^{++}{K}^0$ with its unique decay into ${\mathrm{\Sigma }}^{+}$ and proton measured with the HADES setup at a kinetic beam energy of 3.5 GeV. The analysis including background determination and a description of the data with a $K_S^0$ Monte Carlo cocktail are presented.