Study of {Lambda}{sup 0} polarization in {ital pp}{r_arrow}{ital p}{Lambda}{sup 0}{ital K}{sup +}{pi}{sup +}{pi}{sup {minus}}{pi}{sup +}{pi}{sup {minus}} at 27.5 GeV

We measured the polarization of 51195 {Lambda}{sup 0}{close_quote}s produced in the specific reaction {ital pp}{r_arrow}{ital p}{Lambda}{sup 0}{ital K}{sup +}{pi}{sup +}{pi}{sup {minus}}{pi}{sup +}{pi}{sup {minus}} with 27.5GeV/{ital c} protons incident on a liquid hydrogen target. Because the reaction was measured completely, the polarization was studied versus the following: {ital x}{sub {ital F}}({minus}1to+1), {Lambda}{sup 0} transverse momentum (0 to 1.32GeV/{ital c}), correlations with the momentum vectors of the other particles in the reaction, and the invariant mass of combinations of particles in the final state. The dependence of the polarization on these variables does not always agree with theoretical expectations. {copyright} {ital 1995 The American Physical Society.}