Search for Quark-Lepton Compositeness in the Dimuon Channel

Data collected with the D{\O} detector at the Fermilab Tevatron at $\sqrt{s}$ = 1.96 TeV are used to search for compositeness of quarks and leptons. The high-mass dimuon mass spectrum obtained with an integrated luminosity of 300 pb$^{-1}$ is compared with that predicted by Drell-Yan (DY) scattering modified by a contact interaction. This interaction is parameterized by a compositeness scale factor $\Lambda$. Preliminary limits on $\Lambda$ are set for constructive and destructive interference between the DY amplitude and the contact interaction for various quark and lepton chiralities.