Identification of b-jets using QCD-inspired observables

3 May 2022, 12:30
20m
Parallel talk WG4: QCD with Heavy Flavours and Hadronic Final States WG4: QCD with Heavy Flavours and Hadronic Final States

Speaker

Oleh Fedkevych

Description

One of the most common final state resulting from high-energy particle collisions features collimated sprays of hadrons. These so-called hadronic jets can be seeded
by particles with very different properties (e.g. from fragmentation, and subsequent hadronization, of very energetic partons or from the hadronic decays of heavy particles, such as the Higgs boson etc). Therefore, the correct identification of the origins of hadronic jets is a key aspect in particle physics.

In this talk I will discuss the issue of separating hadronic jets that contain bottom quarks (b-jets) from jets featuring light partons only. I discuss a recently proposed (2202.05082) b-tagging approach that exploits the application of QCD-inspired jet substructure observables such as one-dimensional jet angularities and the two-dimensional primary Lund plane and demonstrate that these quantities can be used as inputs to modern machine-learning algorithms to efficiently separate b-jets from light ones.

Submitted on behalf of a Collaboration? No

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