Double differential charm and beauty production cross section measurements at 5 TeV in CMS at the LHC

<!--HTML-->Double differential cross sections for the production of prompt $D$$^{*}$ mesons, and $D$$^{*}$ mesons from b hadron decays (non-prompt) are measured through the decays $D$$^{*}$ → $D$$^{0}$$\pi$$_{s}$ → $K$$\pi$$\pi$$_{s}$ and $B$ → $D$$^{*}$ $X$ → $D$$^{0}$$\pi$$_{s}$ → $K$$\pi$$\pi$$_{s}$ $X$ in pp collisions in CMS at a center of mass energy of 5 TeV in the full phase space complementary to LHCb. The separation of prompt from non-prompt $D$$^{*}$ mesons near the production threshold is performed in the kinematic range $_{pT}$ > 1.5 GeV and |$y$| < 2. This procedure and the resulting cross sections in the accessible phase space including a comparison with QCD theory predictions and comparisons with other experiments are presented within this thesis.<br>The procedure including the results of this thesis opens the opportunity for the determination of cross sections for inclusive charm and beauty production at the LHC with different center-of-mass energies down to very low transverse momentum, and the comparison with QCD predictions in next-to-leading order of perturbation theory.