Differential cross-section of high-mass muon pairs produced by a 194 GeV/c $\pi^{-}$ beam on a tungsten target

We present a measurement of the production of muon pairs in 194 GeV/c π−-tungsten interactions. A sample of 155,000 events with mass higher than 4.07 GeV/c2 has been used to determine the differential cross-section as a function of the scaling variables\(\sqrt \tau \) andx F .