Hyperon polarization in \nu_\mu charged current interaction at the NOMAD energies

Abstract

We show that, in ${\nu }_{\mu }N\to {\mu }^{-}\Lambda X$ at the NOMAD energies, it is impossible to separate the products of the fragmentation of the struck quark from those of the nucleon remnant. The latter has a large contribution even in the current fragmentation region and has to be taken into account in calculating $\Lambda$ polarization using different pictures. Based on this, we make a rough estimation for the longitudinal $\Lambda$ polarization in ${\nu }_{\mu }N\to {\mu }^{-}\Lambda X$ at the NOMAD energies. A comparison with the data is given and predictions for ${\nu }_{\mu }N\to {\mu }^{-}{\Sigma }^{+}X$ are presented.

Comments: 11 pages, 3 figures