CERN-LHC. Measurements of the differential cross section for Z production as a function of $\phi^*$ (phi*) and rapidity using the 2 electron and 2 muon final states.
The fiducial region is defined as:
- 2e or 2mu
- one lepton with ptLepton > 30 GeV and |etaLepton|<2.1
- one lepton with ptLepton > 20 GeV and |etaLepton|<2.5
- mll must be between 60 and 120 GeV