Trimuons from charm

(1978). doi:10.1016/0370-2693(78)90073-4
We have calculated charm pair production in ν μ N collisions using quantum chromodynamics (QCD). The resulting trimuon rate turns out to be small at present energies: σ(3μ) σ(1μ)≲10 −6 at E ν = 200 GeV for α s = 0.2. (However, this process may be measurable at the high energies attainable with colliding beam ep machines.) We emphasize the general importance of looking for inclusive J Ψ or the bound states of heavier flavors in deep inelastic reactions, as a signal for the pair production of heavy quarks.