Polarization asymmetries in photoproduction of high transverse momentu
m mesons are a flavor sensitive way to measure the polarized quark dis
tributions. We calculate the expected asymmetries in several models, a
nd find that the asymmetries are significant and also significantly di
fferent from model to model, Suitable data may come as a by-product of
deep inelastic experiments to measure g(1) or from dedicated experime
nts. (C) 1997 Elsevier Science B.V.