Measurements are reported of the WZ and ZZ production cross sections in proton-proton collisions at s=8$$\sqrt{s} = 8$$TeV$$\,\text {TeV}$$ in final states where one Z boson decays to b-tagged jets. The other gauge boson, either W or Z, is detected through its leptonic decay (either W→eν$$\mathrm {W}\rightarrow \mathrm {e}
u $$, μν$$\mathrm {\mu }
u $$ or Z→e+e-$$\mathrm {Z}\rightarrow \mathrm {e}^+\mathrm {e}^-$$, μ+μ-$$\mathrm {\mu ^+}\mathrm {\mu ^-}$$, or νν¯$${
u }\overline{
u }$$). The results are based on data corresponding to an integrated luminosity of 18.9 fb-1$$^{-1}$$ collected with the CMS detector at the Large Hadron Collider. The measured cross sections, σ(pp→WZ)=30.7±9.3(stat.)±7.1(syst.)±4.1(th.)±1.0(lum.)pb$$\sigma (\mathrm {p}\mathrm {p}\rightarrow \mathrm {W}\mathrm {Z}) = 30.7 \pm 9.3\,\text {(stat.)} \pm 7.1\,\text {(syst.)} \pm 4.1\,\text {(th.)} \pm 1.0\,\text {(lum.)} \,\text {pb} $$ and σ(pp→ZZ)=6.5±1.7(stat.)±1.0(syst.)±0.9(th.)±0.2(lum.)pb$$\sigma (\mathrm {p}\mathrm {p}\rightarrow \mathrm {Z}\mathrm {Z}) = 6.5 \pm 1.7\,\text {(stat.)} \pm 1.0\,\text {(syst.)} \pm 0.9\,\text {(th.)} \pm 0.2\,\text {(lum.)} \,\text {pb} $$, are consistent with next-to-leading order quantum chromodynamics calculations.
