The contribution of qq̄ annihilations to dimuon production in πN interactions
We present data on dimuon production by 16 GeV π+ and π- beams on a Cu target. From the data we evaluate, for π-N collisions, the fraction of dimuon events that originate from the annihilation process q q ̄ → μ+μ-. Using this information the experimentally determined cross section for the process q q ̄ → μ+μ- is observed to be in agreement with the Drell-Yan model over a wide range of incident energies. The observed deviations from exact scaling are of the order predicted by QCD calculations for the Q2-dependence of the nucleon and the pion structure function. © 1979.
Publication Source (Journal or Book title)
Physics Letters B
Reece, C., LeBritton, J., McCal, D., Metcalf, W., Melissinos, A., Alspector, J., Borenstein, S., Kalbfleisch, G., Strand, R., & Abashian, A. (1979). The contribution of qq̄ annihilations to dimuon production in πN interactions. Physics Letters B, 85 (4), 427-431. https://doi.org/10.1016/0370-2693(79)91289-9