Exotic narrow resonance searches in the system Lambda K0s in p+propane collisions at 10 GeV/c

Aslanyan, P. Zh.; Emelyanenko, V. N.; Rikhkvitzkaya, G. G.

Exotic narrow resonance searches in the system Lambda K0s in p+propane collisions at 10 GeV/c

Authors

Aslanyan, P. Zh.

Emelyanenko, V. N.

Rikhkvitzkaya, G. G.

Description

Experimental data from the 2m propane bubble chamber have been analyzed to search for an exotic baryon states, in the $ΛK^0_s$ decay mode for the reaction p+$C_3H_8$ at 10 GeV/c. The invariant mass spectrum $ΛK^0_s$ observe a narrow peaks at 1750$\pm$18, 1795$\pm$18,1850$\pm19$ MeV/$c^2$ and full widths of $Γ_{exp.}$= 32$\pm$6, 44$\pm$15, 29.0$\pm$8 MeV/$c^2$. The statistical significance of these peaks has been estimated as 5.6, 3.3 and 3.0 S.D., respectively. There are the small enhancements in mass regions of (1650-1675) and (1925-1950) МэВ/с$^2$. These would be candidates for the $N^0$ or the $Ξ^0$ pentaquark states. The investigation has been performed at the Veksler and Baldin Laboratory of High Energies, JINR.
11 pages, 6 figure