Measurements of B-quark production at 7 TeV with the CMS experiment

In this article are presented measurements in the beauty sector performed by the CMS experiment in proton-proton collisions at $\sqrt{s}$~=~7~TeV. The total and differential cross sections versus transverse momentum and rapidity for B$^0_d$, B$^0_s$, and B$^+$ mesons is measured, together with the inclusive cross section for $b-\bar{b}$ production, based on fitting the impact parameter of the dimuons coming from the decay of the $b-\bar{b}$ pair. Also, angular correlations between beauty and anti-beauty hadrons, probing for the first time the small angular separation region are determined. Results are compared with predictions based on perturbative QCD calculations at leading and next-to-leading order.