Jet Substructure Measurements Sensitive to Soft QCD effects with the ATLAS Detector

Study of energy flow within the body of hadronic jets is useful in identi cation of boosted heavy particles, is an important probe of perturbative QCD and is sensitive to soft QCD effects. Three recent ATLAS results on substructure measurements sensitive to soft QCD: -Measurement of the kT splitting scales in Z leptonic events in pp collisions at 8 TeV with the ATLAS detector -Measurement of the soft-drop jet mass in pp collisions at 13 TeV with the ATLAS detector - Measurement of colour flow using jet-pull observables in tt events with the ATLAS experiment in pp collisions at 13 TeV. Discrepancy between predictions and data are observed in non-perturbative regime than data are useful to tune MC in this regime which is sensitive to pile-up and underline event.