Speaker
Description
Jet substructure measurements, using the distribution of final state hadrons, provide insight into partonic shower and hadronisation. Observables for such measurements include the transverse momentum ($j_\mathrm{T}$) and longitudinal momentum fraction ($z$) of jet constituent particles. ALICE has recently measured the $j_\mathrm{T}$ distributions of the jet fragments in proton-proton and proton-lead collisions $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV, which are well-described by parton-shower models. This talk will present a new ALICE measurement of jet fragmentation in pp collisions, which extends to multiple dimensions in $j_\mathrm{T}$ and $z$ to provide a more detailed picture of the parton shower and fragmentation processes. The measured $j_\mathrm{T}$ distributions are characterized by a fit that separately constrains the hadronization and perturbative components of the shower. The final results and their fitted distributions are compared with the theoretical predictions.
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