  We compute the total cross section of a heavy quarkonium on a hadron target
in leading twist QCD, including target mass corrections. Our method relies on
the analytical continuation of the operator product expansion of the scattering
amplitude, obtained long ago by Bhanot and Peskin. The cross section has a
simple partonic form, which allows us to investigate the phenomenology of J/psi
and Upsilon dissociation by both pions and protons.
