Orateur
Description
The measurement of the production of hadrons containing charm or beauty quarks in proton–proton ($pp$) collisions provides an important test for perturbative quantum chromodynamics calculations ($p$QCD).
The ALICE detector allows us to perform precise measurements of non-prompt D-meson production, which are an excellent tool to investigate the production of beauty quarks in $pp$ collisions. In this contribution, recent results on the $p_{T}$-differential production cross section of D mesons originating from beauty-hadron decays (i.e. non-prompt D mesons) and their comparison with the equivalent results for prompt D mesons in $pp$ collisions at a centre-of-mass energy of $\sqrt{s} = 5.02$ and $\sqrt{s} = 13$ TeV, will be presented. In addition, the non-prompt D$^{+}$/D$^{0}$ and {D$_s^+$}/(D$^{0}$+D$^{+}$) $p_{T}$-differential production yield ratios and the measurements of fragmentation fraction ratio of beauty quarks into strange and non-strange B mesons in $pp$ collisions, to test their universality across different collision systems, will be presented. The results will also be compared with $p$QCD predictions and other theoretical models. To perform these measurements a machine-learning multiclass classification algorithm for the selection of the D mesons coming from beauty-hadron decays is employed.
