Studying hadronization and QCD dynamics with jet substructure at LHCb

Jet production at the LHC provides an invaluable probe of QCD dynamics ranging from initial-state parton distributions to final-state jet fragmentation functions. High-precision perturbative calculations for jet substructure have recently become available, allowing direct comparison of experimental measurements to theory. Measurements of jet substructure therefore offer a direct test of first-principles theoretical prescriptions for jet formation and fragmentation in perturbative QCD. Selecting jets containing a heavy-flavor hadron extends tests of QCD fragmentation to a regime where parton mass and color factors play a crucial role, probing the limits of modern perturbative calculations. Recent jet substructure results in pp collisions at 13 TeV from LHCb will be presented.