Search for Rare Decays of D^{0} Mesons into Two Muons

LHCb Collaboration

Research output: Indexed journal article Articlepeer-review

3 Citations (Scopus)


A search for the very rare D^{0}→μ^{+}μ^{-} decay is performed using data collected by the LHCb experiment in proton-proton collisions at sqrt[s]=7, 8, and 13 TeV, corresponding to an integrated luminosity of 9  fb^{-1}. The search is optimized for D^{0} mesons from D^{*+}→D^{0}π^{+} decays but is also sensitive to D^{0} mesons from other sources. No evidence for an excess of events over the expected background is observed. An upper limit on the branching fraction of this decay is set at B(D^{0}→μ^{+}μ^{-})<3.1×10^{-9} at a 90% C.L. This represents the world's most stringent limit, constraining models of physics beyond the standard model.

Original languageEnglish
Article number041804
Pages (from-to)41804
Number of pages1
JournalPhysical Review Letters
Issue number4
Publication statusPublished - 28 Jul 2023


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