Abstract
We present recent results on measurements of jet substructures using grooming techniques with pp and PbPb data collected with the CMS detector at a center-of-mass energy of 5.02 TeV per nucleon pair. The grooming technique is used to focus on the hard structure of the jet by extracting the two subjets corresponding to the hardest parton splitting. This allows us to study medium-induced gluon emission properties and the evolution of partons through dense QCD matter. The hard jet structure is sensitive to the virtuality evolution of a parton in the medium, as well as the role of (de)coherent gluon emitters. Results and prospects on the transverse momentum balance, mass and angular difference of the two hard subjets over a wide range of jet transverse momentum and various collision centrality selections are discussed.
Highlights
In heavy ion collisions hard scattering of partons occurs early in the process
We present recent results on measurements of jet substructures using grooming techniques with pp and PbPb data collected with the CMS detector at a center-of-mass energy of 5.02 TeV per nucleon pair
Interaction with the QCD medium could temporarily increase the virtuality of the parton which leads to a different gluon emission probability [19, 20, 21, 22]
Summary
In heavy ion collisions hard scattering of partons occurs early in the process. The scattered parton would travel through a hot and dense QCD medium created by interaction between other nucleons in the collision. Jet Substructure through Splitting Functions And Mass in pp and PbPb collisions at 5.02 TeV with CMS We present recent results on measurements of jet substructures using grooming techniques with pp and PbPb data collected with the CMS detector at a center-of-mass energy of 5.02 TeV per nucleon pair.
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