Test of Scaling in Muon-Pair Production by Hadrons

Abstract

We have measured the inclusive production of massive dimuons ($7<~M_{\mu \mu }<~11$ ${\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c}}^2$) by 200-, 300-, and 400-GeV protons incident on Cu in order to check whether the dimensionless cross section ${M_{\mu \mu }}^3{\left[\frac{d\sigma }{d{M}_{\mu \mu }\mathrm{dy}}\right]}_{y=0\mathrm{}}$ is a function of $\frac{{M_{\mu \mu }}^2}{s}$ alone, where $s$ is the square of the c.m. energy. The results support the scaling hypothesis.