A search for the very rare D0 → μþμ− decay is performed using data collected by the LHCb experiment in proton-proton collisions at √s=7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. The search is optimized for D0 mesons from Dþ → D0πþ decays but is also sensitive to D0 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 BðD0 → μþμ−Þ < 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
(2023). Search for Rare Decays of D0 Mesons into Two Muons [journal article - articolo]. In PHYSICAL REVIEW LETTERS. Retrieved from https://hdl.handle.net/10446/264295
Search for Rare Decays of D0 Mesons into Two Muons
Lupato, A.;Redi, F.;
2023-01-01
Abstract
A search for the very rare D0 → μþμ− decay is performed using data collected by the LHCb experiment in proton-proton collisions at √s=7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. The search is optimized for D0 mesons from Dþ → D0πþ decays but is also sensitive to D0 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 BðD0 → μþμ−Þ < 3.1 × 10−9 at a 90% C.L. This represents the world’s most stringent limit, constraining models of physics beyond the standard modelFile | Dimensione del file | Formato | |
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