Speaker
Description
Jet substructure measurements are a powerful tool that probe the parton shower differentially in regions of the QCD radiation phase space. They allow us to study the fragmentation patterns of parton showers in proton-proton collisions as well as their modification by the quark-gluon plasma (QGP) in heavy-ion collisions. Jet substructure can also be used to search for QGP-like modifications in small collision systems. The ALICE experiment has a high-precision tracking system allowing for jet measurements down to low transverse momenta, which makes it important for jet substructure measurements in this regime.
In this presentation, we report several recent jet substructure results in both minimum bias and high multiplicity proton-proton collisions, as well as in Pb–Pb collisions by the ALICE Collaboration. These will include the fully corrected inclusive measurements of the shared momentum fraction of first groomed splitting and the groomed jet radius, as well as measurement of jet axis differences and generalized jet angularities. We also report the measurement of inclusive and leading subjet fragmentation. By mitigating the effects of the underlying event and hadronization processes, these measurements can be compared to theoretical calculations to provide new constraints on the physics that underpin parton fragmentation and jet quenching.
