Tracing the origin of left-right asymmetries in inclusive single-spin reactions

It is shown that the origin of the striking left-right asymmetries observed in single-spin inclusive hadron production processes in high-energy hadron-hadron collisions can be traced by performing suitable experiments. Several new experiments are proposed. The possible outcomes are summarized together with those of other relevant experiments which have already been suggested. It is pointed out that the results of such a set of experiments will not only be able to differentiate between existing theoretical models, but also be helpful in locating the source(s) of the observed asymmetries.