FCC Physics and Experiments Note Submission

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Published March 10, 2025 | Version v1
Preprint Open

Sensitivity study of the search for the rare decay $D^0 \to \pi^+\pi^- \nu \bar{\nu}$ at FCC-ee

Authors/Creators

  • 1. ROR icon TU Dortmund University
  • 2. ROR icon University of Clermont Auvergne
  • 3. ROR icon Brookhaven National Laboratory
  • 4. Université Clermont-Auvergne

Description

This note presents a sensitivity study for the rare charm decay $D^0 \to \pi^+\pi^- \nu \bar{\nu}$ at the Future Circular Collider (FCC-ee) operated a the $Z$ pole with $6 \times 10^{12}$ produced $Z$ bosons. Preliminary results indicate that an observation with a significance $5(3)~\sigma$ at the level of $1.6 \times 10^{−6} (9.7 \times 10^{−7})$ could be possible, which is within the parameter space allowed in BSM models. The presented results are very preliminary and will be developed further.

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D02pipinunubar_analysis_note.pdf

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Additional details

Funding

European Commission
FCCIS - Future Circular Collider Innovation Study 951754

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