Measuring luminosity at LHCb using elastic diphoton dimuon production
  We report on an indirect method being used to measure luminosity at LHCb. It involves recording the event rate of elastic diphoton dimuon production. Preliminary MC studies suggest that with 1 fb^{-1} of data this method could provide a luminosity measurement with a precision of better than 2% 
Dermot Moran
hep-ex