Correlation Between Transverse Polarization and Rapidity of Λ Produced in S+Pb Collisions at 200GeV/c Per Nucleon

The dependence of transverse polarization on rapidity of Λ produced in S+Pb collisions at 200 GeV/c per nucleon has been studied. The original experimental data are from NA36 Collaboration at SPS of CERN. The precession effect of Λ spin, owing to the interactions between spin moment of Λ and the magnetic field on the path which Λ passes through, on the polarization has been taken into account. The results show that there are slight differences for the transverse polarization in different rapidity-region. The origins for these results have been analysed and discussed.