Abstract
Jet substructure observables are powerful tools for the identification of boosted heavy particles and for probing QCD at different energy scales in proton-proton collisions at the LHC. In this work three recent ATLAS measurements sensitive to soft QCD effects and performed with the use of jet substructures are described. Their are kt splitting scales, soft-drop jet masses and pull-jet angles. Some discrepancies between data and predictions are observed in the non-perturbative regime.
Highlights
The features of energy flow within the body of hadronic jets are very useful for probing perturbative and non-perturbative QCD at hadron colliders
Jet substructure observables are very relevant for an efficient identification of hadronically decaying boosted objects, such as W, Z, H and t, extending significantly the probed energy range and discovery capability of LHC experiments such as ATLAS [1]
Jets are reconstructed from a set of particle momenta which are close in the rapidity-azimuthal y-φ plane according to a clustering algorithm
Summary
The features of energy flow within the body of hadronic jets are very useful for probing perturbative and non-perturbative QCD at hadron colliders. Nowadays, their analysis is used in many studies. Jet substructure observables are very relevant for an efficient identification of hadronically decaying boosted objects, such as W, Z, H and t, extending significantly the probed energy range and discovery capability of LHC experiments such as ATLAS [1] They are measured in data, unfolded for detector effects using an iterative Bayesian technique [2], and compared to QCD calculations and particle-level MC simulations
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