F. Balestra et al., Spin transfer in exclusive Lambda production from (p)over-right-arrowp collisions at 3.67 GeV/c, PHYS REV L, 83(8), 1999, pp. 1534-1537
We report the first polarization transfer measurements for exclusive hypero
n production reactions. The normal spin transfer coefficient D-NN for (p) o
ver right arrow p --> pK(+)<(Lambda)over right arrow> is large and negative
for forward Lambda production at a beam momentum of 3.67 GeV/c, a result q
ualitatively consistent with expectations for a mechanism dominated by kaon
exchange and rescattering. The sign of D-NN is opposite to that observed i
n the fragmentation regime for inclusive Lambda production at much higher e
nergies.