Search for the Rare Decay $D^0 \to \mu^+ \mu^-$ in Proton-Proton Collisions at $\sqrt{s}$= 13.6 TeV
Year: 2025
Type: article
Abstract: A search for the rare decay D0→μ+μ− is reported using proton-proton collision events at s=13.6 TeV collected by the CMS detector in 2022–2023, corresponding to an integrated luminosity of 64.5 fb−1. This is the first analysis to use a newly developed inclusive dimuon trigger, expanding the scope of the CMS flavor physics program. The search uses D0 mesons obtained from D*+→D0π+ decays. No significant excess is observed. A limit on the branching fraction of B(D0→μ+μ−)<2.4×10−9 at 95% confidence level is set. This is the most stringent upper limit set on any flavor changing neutral current decay in the charm sector.
DOI: 10.5167/uzh-284105
Authors: Chekhovsky, V., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J. W., Benato, L., Bergauer, T., Chatterjee, S., Damanakis, K., Dragicevic, M., Hussain, P. S., Jeitler, M., Krammer, N., Li, A., Liko, D., Mikulec, I., Schieck, J., Schöfbeck, R., Schwarz, D., Sonawane, M., Waltenberger, W., Wulz, C.-E., Janssen, T., Kwon, H., Van Laer, T., Van Mechelen, P., Breugelmans, N., D’Hondt, J., Dansana, S., CMS Collaboration, et al
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7126212970
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