Dimuon Production in Proton-Nucleon Collisions at 300 GeV/c

Abstract

In a simple search for muon pairs directly produced in proton-nucleon collisions at 300 GeV performed with two range telescopes looking at a beam dump, we observe the $\psi \left(3.1\mathrm{} \mathrm{GeV}\right)$ and have an indication for a structure around ${m_{\mu \mu }}^2=36\mathrm{}$ Ge${\mathrm{V}}^2$.