Lepton Pair Production at the LHC and the Gluon Density in the Proton
  The hadroproduction of lepton pairs with mass $Q$ and finite transverse momentum $Q_T$ is dominated by quark-gluon scattering in the region $Q_T > Q/2$. This feature provides a new independent method for constraining the gluon density with data at hadron collider energies. Predictions are provided at the energy of the LHC. 
E. L. Berger (Argonne) and M. Klasen (Hamburg)