Speaker
Description
Heavy quarks, namely charm and beauty, are predominantly produced in initial hard-partonic scatterings. Owing to their large masses, their production can be calculated within the perturbative quantum chromodynamics (QCD) framework, while their hadronisation provides unique sensitivity to non-perturbative QCD dynamics.
Theoretically, the production of heavy-flavour hadrons can be calculated within a factorisation approach that convolutes the parton distribution functions of the colliding protons, the partonic cross section, and the fragmentation functions. Consequently, measurements of these cross sections in proton--proton (pp) collisions provide excellent tests of pQCD-based calculations. Furthermore, the relative abundances of different heavy-flavour hadron species offer insight into hadronisation mechanisms.
In this contribution, new measurements based on Run 3 pp-collision data at $\sqrt{s}=13.6$ TeV are presented. New results of non-strange D-meson production and B-meson production are reported, allowing tests of QCD dynamics at two different mass scales.
The charmed-strange baryon $\Xi_{\mathrm{c}}^{+}$ is measured for the first time with ALICE via the $\Xi_{\mathrm{c}}^{+} \rightarrow \mathrm{pK^{-}\pi^{+}}$ decay channel, thanks to the improved tracking and vertexing capabilities. The role of event activity in charm hadronisation is further explored through measurements of the multiplicity dependence of the $\Lambda\mathrm{_{c}^{+}/D^{0}}$ ratio and of the self-normalised yields of $\Xi_{\mathrm{c}}^{+}$ and $\Omega_{\mathrm{c}}^{0}$.
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