Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 98: Electroweak Physics III (W/Z Production and Properties)

T 98.6: Vortrag

Freitag, 4. April 2025, 10:15–10:30, VG 2.103

Heavy-meson reconstruction at the FCC-ee — Kevin Kröninger¹, Romain Madar², Stéphane Monteil², and •Willy Weber^{1, 2} — ¹TU Dortmund University, Department of Physics, Dortmund — ²Université Clermont-Auvergne, Laboratoire de Physique de Clermont, Clermont-Ferrand

The Future Circular Collider (FCC-ee) is a proposed electron-positron collider designed to enable high-energy collisions at unmatched scales. It is expected to produce approximately O(10¹²)   Z → qq events, significantly enhancing our ability to perform precision measurements of electroweak observables.

This talk presents the first steps of a study focusing on decays of charmed D-mesons, which are produced as a result of the hadronization process. D-mesons have a short lifetime (up to 10⁻¹² seconds) before they decay into other particles. In particular, D⁺ → π⁺νν and D⁰ → π⁰π⁰ are considered. Challenges of this final states are the non-detectable neutrinos ν and the hard-to-detect neutral pions π⁰. To identify the two photons coming from the π⁰ decay, high energy and angular resolution are required, which makes the reconstruction and then the tagging of this final state difficult.

The results of this study may contribute to the study of CP violation in the charm sector. Additionally, the insights gained from this research can contribute to design decisions of the calorimeter to be developed for the FCC-ee.

Keywords: FCC-ee; lepton collider; EW precision measurements; heavy flavour