Key points are not available for this paper at this time.
The properties of the dimuon enhancement seen in 400-GeV proton-nucleus collisions have been clarified by a threefold increase in data. We find two peaks whose widths are consistent with our resolution: M₁=9. 4 GeV with Bd{dy|}ₘ=₀=1. 810^-37 cm^2/nucleon and M₂=10. 0 GeV with Bd{dy|}ₘ=₀=0. 710^-37 cm^2/nucleon. Evidence for the possible existence of a third peak near 10. 4 GeV is discussed as are the comparisons with the properties of a qq system, where q is a new heavy quark.
Innes et al. (Mon,) studied this question.