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 0) is investigated using the data obtained with SKAT propane-freon bubble chamber irradiated in the neutrino beam (with E v =3−30 GeV) at the Serpukhov accelerator. The mean multiplicity of V 0 particles in nuclear interactions, $$\langle n_{V^0 } \rangle _A = 0.092 \pm 0.010$$ , is found to exceed significantly that in “quasideuteron” interactions, $$\langle n_{V^0 } \rangle _D = 0.063 \pm 0.013$$ . The ratio of $$\rho _{V^0 } = \langle n_{V^0 } \rangle A/\langle n_{V^0 } \rangle _D = 1.46 \pm 0.23$$ is larger than that for π− mesons, $$\rho _{\pi ^ - } = 1.10 \pm 0.03$$ . It is shown that the multiplicity gain of V 0 particles can be explained by intranuclear interactions of produced pions.