Abstract
Two-particle correlations in relative azimuthal angle (Δϕ) and pseudorapidity (Δη) have been used to study heavy-ion collision dynamics, including medium-induced jet modification. Further investigations also showed the importance of Multiple Parton Interactions (MPI) in high-multiplicity pp collisions, which are often described by pQCD-inspired models. In these proceedings the latest ALICE measurements of two-particle correlations as a function of multiplicity in pp collisions are presented using the data from Run I and Run II at the LHC.
Highlights
Particle production in high-energy pp collisions at the LHC is expected to have a substantial contribution from Multiple Parton Interactions (MPI)
This can be studied via the two-particle correlation technique, where pair yields are used to probe the parton fragmentation process and the contribution of MPI to particle production
Measurements of the number of uncorrelated seeds suggest plicity which might be an indication of a limit in MPI
Summary
Particle production in high-energy pp collisions at the LHC is expected to have a substantial contribution from Multiple Parton Interactions (MPI). This can be studied via the two-particle correlation technique, where pair yields are used to probe the parton fragmentation process and the contribution of MPI to particle production. ALICE, being dedicated to study heavy-ion collisions at the LHC, has an extensive pp physics program. In these proceedings the latest ALICE results from pp collisions on minijets, the near-side jet peak, and long-range correlations are presented
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