Erlangen 2026 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 56: Data, AI, Computing, Electronics VI
T 56.6: Vortrag
Mittwoch, 18. März 2026, 17:30–17:45, KH 02.014
Development of Exclusive Tagging Algorithms for b-hadrons at FCC-ee — •Elgi Orozi1, Florian Bernlochner2, Valerio Bertacchi2, Thomas Kuhr1, Markus Prim2, and Slavomira Stefkova2 — 1Ludwig-Maximilians-Universität München (LMU), München, Germany — 2Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
The FCC-ee physics programme will feature operations at energies ranging from √s = mZ up to the tt production threshold. The enormous statistics of Z-boson decays will allow the study of beauty-quark electroweak precision observables with exceptional statistical precision. Identifying b-hadrons in high-statistics Z → bb events is therefore crucial for probing small deviations from the Standard Model. While existing exclusive tagging approaches, such as the Belle II FEI, provide a conceptual framework, they must be adapted to the high-multiplicity environment at FCC-ee, where hadronisation, initial- and final-state radiation, and track densities are significantly more complex.
In this work, we develop and assess the performance of an exclusive B-tagging algorithm for FCC-ee, based on hierarchical decay reconstruction combined with gradient-boosted decision tree classifiers. This configurable framework performs track combination, vertex fitting, feature extraction, and multivariate classification. As a benchmark, we reconstruct the decay channel B+ → D0[→ K+π−]π+ from simulated Z → bb events, using the IDEA detector concept. This talk will provide insight into the feasibility of exclusive B-tagging at FCC-ee and outline future developments of advanced tagging strategies.
Keywords: Flavour Physics; B Mesons; Tagging; Machine Learning; FCC