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*+→𝐷0⁢𝜋+ 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.

Chekhovsky, V., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J. w., et al. (2025). Search for the Rare Decay 𝐷0→𝜇+⁢𝜇− in Proton-Proton Collisions at √𝑠=13.6  TeV. PHYSICAL REVIEW LETTERS, 135(15), 1-21 [10.1103/zc76-rgcp].

Search for the Rare Decay 𝐷0→𝜇+⁢𝜇− in Proton-Proton Collisions at √𝑠=13.6  TeV

Battilana, C.;Bonacorsi, D.;Capiluppi, P.;Castro, A.;Cuffiani, M.;Diotalevi, T.;Fanfani, A.;Giommi, L.;Guiducci, L.;Lorusso, M.;Lunerti, L.;Navarria, F.  L.;Paggi, G.;Rossi Tisbeni, S.;Rovelli, T.;Siroli, G.  P.;
2025

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*+→𝐷0⁢𝜋+ 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.
2025
Chekhovsky, V., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J. w., et al. (2025). Search for the Rare Decay ��0→��+⁢��− in Proton-Proton Collisions at √��=13.6  TeV. PHYSICAL REVIEW LETTERS, 135(15), 1-21 [10.1103/zc76-rgcp].
Chekhovsky, V.; Hayrapetyan, A.; Makarenko, V.; Tumasyan, A.; Adam, W.; Andrejkovic, J.  w.; Benato, L.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; ...espandi
File in questo prodotto:
File Dimensione Formato  
zc76-rgcp.pdf

accesso aperto

Tipo: Versione (PDF) editoriale / Version Of Record
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 1.09 MB
Formato Adobe PDF
1.09 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1045505
Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 0
social impact