SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 4: Searches I
T 4.5: Vortrag
Montag, 20. März 2023, 17:30–17:45, HSZ/0403
Substructure tagging with mass and pT dependent variable-R jet clustering and a soft drop veto — •Anna Benecke1, Anna Albrecht2, and Roman Kogler3 — 1UCLouvain, Belgium — 2Universität Hamburg, Germany — 3DESY, Germany
The Heavy Object Tagger with Variable R (HOTVR) is an algorithm for the clustering and identification of boosted, hadronically decaying, heavy particles. The central feature of the HOTVR algorithm is a vetoed jet clustering with variable distance parameter R, that decreases with increasing transverse momentum of the jet. In this talk, we present improvements to the HOTVR algorithm, replacing the mass jump with a soft drop veto in the clustering. We study the performance of jet substructure tagging with HOTVR and ungroomed variable R jets, where we use machine learning techniques and energy flow polynomials to analyse the information loss from the soft drop veto. In addition, we show preliminary results of a distance parameter that changes with the jet mass and the transverse momentum, allowing to achieve an optimal value of R for W, Z, H bosons and top quarks simultaneously.