Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2007-12-07
Physics
High Energy Physics
High Energy Physics - Experiment
8 pages, 9 figures, Proc. XII International Conference on Hadron Spectroscopy, Frascati, INFN, 8-12 October,2007
Scientific paper
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.
Aslanyan Zh. P.
Emelyanenko V. N.
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