Erlangen 2026 – scientific programme

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T: Fachverband Teilchenphysik

T 78: Flavour Physics V

T 78.7: Talk

Thursday, March 19, 2026, 17:45–18:00, KH 02.014

Charm and beauty separation using reconstructed D* mesons with the b-hive framework in CMS — •Shruti Shetty¹, Lucas Karwatzki^1,2, Alexander Schmidt¹, Achim Geiser², and Arnd Meyer¹ — ¹III. Physikalisches Institut A, RWTH Aachen University — ²DESY, Hamburg

Reliable separation of charm and beauty hadrons is essential for precision measurements and searches involving heavy flavour at the LHC. In this study, reconstructed D^* → D⁰π_s candidates, with D⁰ → Kπ decays, are investigated using simulated proton-proton collision samples from the CMS experiment. For the first time, hadron-level particle identification is implemented within the b-hive framework, a modular training framework for state-of-the-art object tagging in the Python ecosystem used by the CMS experiment. This approach provides the basis for future optimization of charm and beauty identification and its application in physics analyses.

Keywords: Charm-beauty separation; Flavour tagging; Machine learning; b-hive