Measurement of the electroweak production of a Z boson and two jets in   proton-proton collisions at 7 and 8 TeV
  A measurement of the electroweak production cross section of a Z boson and two jets is performed using proton-proton collision data at centre-of-mass energies of 7 and 8 TeV. The data is collected by the CMS experiment at the LHC with an integrated luminosity of 5 and 19 fb$^{-1}$, respectively. A study on the hadronic activity between the two tagging jets is also presented. 
Tom Cornelis (for the CMS Collaboration)
hep-ex