Measurement of Z boson + heavy flavor jet production in pp collisions at $\sqrt{s}$ = 8 TeV

We present results on the heavy flavor jet production in association with the Z boson using proton-proton collision data collected with the CMS detector at a center of mass energy $\sqrt{s}$ = 8 TeV. We discuss, in particular, the measurement of the ratio of cross-sections, $\sigma$(Z+c-jet)/$\sigma$(Z+jets) and $\sigma$(Z+b-jet)/$\sigma$(Z+jets). Studies of these processes provide tests of perturbative QCD predictions and non-perturbative effects. These processes are also important backgrounds to many precision SM measurements as well as to searches for new physics.