Searches for Multibaryon States with $\Lambda$ Hyperon Systems in pa Collision at 10 Gev/c

Abstract

Experimental data as a stereo photographs from the 2m propane bubble chamber LHE, JINR have been analyzed for exotic multibaryon metastable and stable states searches. A number of peculiarities were found in the effective mass spectra of: 1)$\Lambda \pi^{\pm}$,$\Lambda \pi^+ \pi^-$, $\Lambda p$, $\Lambda p p$, $\Lambda \pi p$,$\Lambda \Lambda $ and $\Lambda K^0_S$ subsystems. The observed well known $\Sigma^{*+}$(1385),$\Lambda ^*(1600)$ and $K^{*\pm}$(892)resonances are good tests for this method. The width of $\Sigma^{*-}(1385)$ for p+A reaction is two time larger than that presented in PDG. The $\Lambda \pi^-$ spectrum observed enhancement in mass range of 1345 MeV/$c^2$ which interpreted as a stopped in nucleus $\Xi^-$. The cross section of stopped $\Xi^-$ production is $\approx$ 8 times larger than obtained by fritiof model with same experimental conditions.