Measurement of jet jet substructure in neutral-current deep inelastic ep scattering at high Q2 with ZEUS at HERA

Jet substructure for jets produced in deep inelastic ep scattering
was studied for exchanged boson virtualities Q2 > 125 GeV2
with the ZEUS at HERA  using an integrated luminosity of 370 pb-1 
Jets were identified in the laboratory frame using the kT cluster 
algorithm in the longitudinally invariant inclusive mode. The substructure 
of jets was investigated in terms of the jet shape and used to highlight 
differences between quark- and gluon-initiated jets. Leading-logarithm 
parton-shower Monte Carlo models and next-to-leading-order QCD calculations 
are compared to the data and describe the measurements well.