Speaker
Description
Heavy quarks (charm and beauty) are produced in hard partonic scatterings, making their cross sections in proton–proton (pp) collisions calculable in perturbative quantum chromodynamics (pQCD) and thus providing stringent tests of theory. Furthermore, the associated production of two charm hadrons in a single collision probes the dynamics of multiparton interactions, distinguishing between single (SPS) and double parton scattering (DPS) processes.
In this contribution, we report measurements of prompt D-meson production, as well as non-prompt/prompt production cross-section ratios. The final result of the measurement of the transverse-momentum ($p_\mathrm{T}$) production cross section of $\mathrm{B}^0$ mesons down to $p_\mathrm{T} = 1$ GeV/$c$ at midrapidity is presented. The rapidity dependence of B-meson production is discussed by computing the ratio with respect to LHCb measurements at forward rapidity. The associated production of $\mathrm{D}^0$ and $J/\psi$ pairs in pp collisions at 13.6 TeV is presented as well, where $\mathrm{D}^0$ mesons are reconstructed at midrapidity, while $J/\psi$ candidates are measured at both forward and midrapidity. The production of $J/\psi$ pairs at forward rapidity in pp collisions at 13 TeV is also reported. These comprehensive measurements are compared to pQCD calculations and phenomenological models, providing crucial constraints on heavy-quark production, hadronisation, and multiparton interaction dynamics.