The Observed Correlations for the Strange Multibaryon States in Systems with $\Lambda$-Hyperon from pa Collision at Momentum of 10 Gev/$c$

TL;DR

This paper reports the observation of exotic strange multibaryon states in systems with $\Lambda$-hyperons from proton collisions at 10 GeV/c, noting mass shifts and width enhancements indicative of medium effects and stopped $\Xi^-$ contributions.

Contribution

It presents new experimental evidence of strange multibaryon states and detailed analysis of their mass and width behaviors, highlighting medium effects and contributions from stopped $\Xi^-$ decays.

Findings

Mass shifts of $\Sigma^{*-}(1385)$ and $\Sigma^{*+}(1385)$ to 1370 MeV/$c^2$

Width of $\Sigma^0$ approximately twice the experimental error

Enhanced production of hyperons observed

Abstract

he observed well-known resonances $\Sigma^0$ $\Sigma^{*+}$(1385) and $K^{*\pm}$(892) from PDG are good tests of this method. Exotic strange multibaryon states have been observed in the effective mass spectra of: $\Lambda \pi^{\pm}$,$\Lambda \gamma$, $\Lambda p$, $\Lambda p p$ subsystems. The mean value of mass for $\Sigma^{*-}(1385)$ resonance is shifted till mass of 1370 MeV/$c^2$ and width is two times larger than the same value from PDG. Such kind of behavior for width and invariant mass of $\Sigma^{*-}(1385)$ resonance is interpreted as extensive contribution from stopped $\Xi^-\to\Lambda\pi^-$ and medium effect with invariant mass. The mean value of mass for $\Sigma^{*+}(1385)$ from secondary interactions is also shifted till mass of 1370 MeV/$c^2$. The width of $\Sigma^0$ is $\approx$ 2 times larger than the experimental error. There are enhancement production for all observed hyperons.