Recently, a reconsideration of Drell-Yan cross sections at moderate energies
and masses has suggested the possibility of relevant enhancements of the cross
sections in some kinematical regions. If confirmed, these predictions could
largely affect the planning of Drell-Yan experiments aimed at transverse spin
measurements after 2010. More in general, the problem is present of a precision
measurement of the τ dependence of Drell-Yan cross sections. Here we
discuss the feasibility of such a measurement within short time at the COMPASS
apparatus, and its relevance for the PANDA experiment.Comment: 4 pages, 4 figures, in print on Physical Review