  We predict the triple differential cross section of the Drell-Yan process
(pbar p -> l^+l^-X) in the kinematical regimes relevant for the upcoming PANDA
experiment, using a model that accounts for quark virtuality as well as
primordial transverse momentum. We find a cross section magnitude of up to 10
nb in the low mass region. A measurement with 10% accuracy is desirable in
order to constrain the partonic transverse momentum dispersion and the spectral
function width within +-50 MeV and to study their evolution with M and sqrt(s).
