Speaker
Description
Jet-substructure observables provide powerful probes of Quantum Chromodynamics, offering detailed access to parton-shower evolution, colour coherence, and hadronization in vacuum. The LHCb detector, with its forward acceptance and excellent tracking and vertexing performance, enables measurements of jet structure at low and moderate transverse momentum in a kinematic region complementary to the central LHC experiments. Using pp collisions at \sqrt{s} = 13 TeV, LHCb has established a broad programme of substructure measurements for inclusive and flavour-tagged jets. These studies include observables such as the Lund jet plane, energy–energy correlators, jet mass, and hadron-in-jet distributions, providing sensitivity to both perturbative and non-perturbative aspects of QCD. Comparisons between beauty-initiated and light-quark–enriched jets allow the investigation of mass-dependent radiation effects, while theoretically well-defined flavour-tagging schemes enable precision tests of perturbative QCD. Together, these measurements extend jet-substructure studies to the forward region and provide new constraints for parton-shower and hadronization models.
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