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First observation of the rare $4\mu$ decay of the $\eta$ meson

The first observation of the double-Dalitz decay $\eta \rightarrow \mu^+\mu^-\mu^+\mu^-$ is reported with 2017 and 2018 data by the CMS experiment at the CERN LHC. A signal having a statistical significance well in excess of 5 standard deviations was identified using high-rate muon trigger data coll...

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Detalles Bibliográficos
Autor principal:	CMS Collaboration
Publicado:	2023
Materias:	Particle Physics - Experiment
Acceso en línea:	http://cds.cern.ch/record/2850937

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