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Search for rare decays of D0 mesons into two muons

A search for the very rare 𝐷0→𝜇+⁢𝜇− 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 𝐷*+→𝐷0⁢𝜋+ decays but is also sensitive to 𝐷0 mesons f...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Borsato, Martino (Author) , Caspary, Rowina (Author) , Frau, Giulia (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Hu, Jiangqiao (Author) , Kopecná, Renata (Author) , Leverington, Blake (Author) , Li, Peilian (Author) , Marks, Jörg (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Wang, Chishuai (Author) , Witola, Lukas (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: July 2023
In: Physical review letters
Year: 2023, Volume: 131, Issue: 4, Pages: 041804-1-041804-13
ISSN:1079-7114
DOI:10.1103/PhysRevLett.131.041804
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevLett.131.041804
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.131.041804
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Author Notes:$hR. Aaij et al.* (LHCb Collaboration)
Description
Summary:A search for the very rare 𝐷0→𝜇+⁢𝜇− 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 𝐷*+→𝐷0⁢𝜋+ 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 ℬ⁡(𝐷0→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.
Item Description:*LHCb Collaboration: R. Aaij, S. Bachmann, M. Borsato, R. Caspary, G. Frau, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, R. Kopecna, B. Leverington, P. Li, J. Marks, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, A. Zhelezov [und 1055 weitere Personen]
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Veröffentlicht: 26. Juli 2023
Gesehen am 12.05.2025
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.131.041804

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