Associated production of heavy flavored final state and vector boson and search for $\rm{H}\rightarrow\rm{bb}$ at CMS experiment

The mechanism of production of heavy-flavor mesons, containing b or c quarks, in association with vector bosons W$^\pm$ and Z$^0$, in the Standard Model is only partially understood. The study of events with one or two well-identified and isolated leptons accompanied by b-jets or b-mesons is therefore crucial to refine the theoretical calculations in perturbative QCD, as well as validate associated prediction from simulation. The understanding of these processes is furthermore required by Higgs physics studies and searches beyond the Standard Model. Using the LHC proton-proton collision data collected in 2010 and 2011 at a centre of mass energy of 7 TeV by the CMS detector, production cross-section of Z$^0$ plus one or several b-jets, as well as of W$^\pm$ plus two b-jets are computed. Finally, the measurement of the associated production rate of a c-quark and a W$^\pm$ boson with respect to boson charge and to W$^\pm$ in association with light jets are also presented, allowing to probe and constrain the strange quark content of the proton. Recent results on H$\rightarrow\rm{b\overline{b}}$ associated production are also discussed.