Speaker
Description
Multiple Parton Interactions (MPI) play a crucial role in hadron-hadron collisions, contributing to the complexity of the final state in high-energy physics experiments. In these interactions, multiple partons from each hadron can simultaneously interact within a single collision event. Among the various MPI scenarios, Double-Parton Scattering (DPS) is the simplest form, where two distinct parton-parton scatterings occur simultaneously. A key element in describing DPS in proton-proton collisions is the effective cross-section, a phenomenological parameter related to the transverse overlap function between partons within the proton. Studying DPS provides valuable insights into the evolution equations of Quantum Chromodynamics (QCD), particularly regarding multi-parton distributions and potential correlations in color and spin degrees of freedom.
The production of heavy quarks, specifically charm and beauty quarks, arises from hard-parton scatterings due to their relatively large masses. As a result, DPS processes involving heavy-quark pairs can be studied by measuring the production cross sections of charm-hadron pairs. In this context, we present recent measurements of D$^0$–D$^0$, D$^0$–J/$\psi$, and J/$\psi$–J/$\psi$ pairs at both midrapidity and forward rapidity in proton-proton (pp) collisions. These measurements are based on Run 2 data at $\sqrt{s}$ = 13 TeV and Run 3 data at 13.6 TeV, collected using the ALICE detector at the Large Hadron Collider (LHC).
