μ pair production in association with a large momentum hadron

Using the recombination model we analyze massive μ pair production in association with a low p_t (almost leading) Π^±, K^± meson in the target fragmentation region. The cross-section size of the Drell-Yan and ψ production processes (DY/ψ) for proton and nuclear targets is evaluated, and their kinematical distributions are discussed. The Π⁺/Π^? ratio of the μ pair associated Π meson offers immediate tests. We point out the feasibility of such studies in the backward region of high statistics fixed-target DY experiments.