A study of the nuclear medium influence on neutral strange particle production in deep inelastic neutrino scattering

Abstract

The influence of nuclear effects on the production of neutral strange particles ($V^{\circ }$) is investigated using the data obtained with SKAT propane-freon bubble chamber irradiated in the neutrino beam (with $E_{\nu }$ = 3-30 GeV) at Serpukhov accelerator. The measured mean multiplicity of $V^{\circ }$ particles in nuclear interactions, ${<n_{V^{\circ }}>}_A$ = 0.096$\pm$0.011, is found to exceed significantly that in 'quasinucleon' interactions, ${<n_{V^{\circ }}>}_N$ = 0.059$\pm$0.012. The ratio of ${\rho }_{V^{\circ }}$ =${<n_{V^{\circ }}>}_A/{<n_{V^{\circ }}>}_N$ =1.61$\pm$0.23 is larger than that for ${\pi }^{-}$ mesons, ${\rho }_{{\pi }^{-}}$ = 1.10$\pm$0.03. It is shown that a dominant part of the multiplicity gain of $V^{\circ }$ particles can be explained by intranuclear interactions of produced pions.