A search for the rare decay D^{0}→μ^{+}μ^{-} is reported using proton-proton collision events at sqrt[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 D^{0} mesons obtained from D^{*+}→D^{0}π^{+} decays. No significant excess is observed. A limit on the branching fraction of B(D^{0}→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.

Search for the Rare Decay D^0 -> mu+mu- in Proton-Proton Collisions at sqrt(s) = 13.8 TeV / 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., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - ELETTRONICO. - 135:(2025), pp. 0-0. [10.1103/zc76-rgcp]

Search for the Rare Decay D^0 -> mu+mu- in Proton-Proton Collisions at sqrt(s) = 13.8 TeV

Ciulli, V.;D'Alessandro, R.;Focardi, E.;Latino, G.;Lenzi, P.;Calandri, A.;
2025

Abstract

A search for the rare decay D^{0}→μ^{+}μ^{-} is reported using proton-proton collision events at sqrt[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 D^{0} mesons obtained from D^{*+}→D^{0}π^{+} decays. No significant excess is observed. A limit on the branching fraction of B(D^{0}→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.
2025
135
0
0
Chekhovsky, V.; Hayrapetyan, A.; Makarenko, V.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Benato, L.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; D...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1439465
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