The J=ψ → μþμ−μþμ− decay has been observed with a statistical significance in excess of five standard deviations. The analysis is based on an event sample of proton-proton collisions at a center-ofmass energy of 13 TeV, collected by the CMS experiment in 2018 and corresponding to an integrated luminosity of 33.6 fb−1. Normalizing to the J=ψ → μþμ− decay mode leads to a branching fraction of ½10.1 þ3.3 −2.7 ðstatÞ 0.4ðsystÞ × 10−7, a value that is consistent with the standard model prediction
Observation of the J/ψ → μ+μ-μ+μ- decay in proton-proton collisions at √s=13 TeV
Abbrescia, M.;Colaleo, A.;De Palma, M.;My, S.;Pompili, A.;Radogna, R.;Venditti, R.;
2024-01-01
Abstract
The J=ψ → μþμ−μþμ− decay has been observed with a statistical significance in excess of five standard deviations. The analysis is based on an event sample of proton-proton collisions at a center-ofmass energy of 13 TeV, collected by the CMS experiment in 2018 and corresponding to an integrated luminosity of 33.6 fb−1. Normalizing to the J=ψ → μþμ− decay mode leads to a branching fraction of ½10.1 þ3.3 −2.7 ðstatÞ 0.4ðsystÞ × 10−7, a value that is consistent with the standard model predictionFile in questo prodotto:
File | Dimensione | Formato | |
---|---|---|---|
PhysRevD.109.L111101.pdf
accesso aperto
Tipologia:
Documento in Versione Editoriale
Licenza:
Creative commons
Dimensione
1.01 MB
Formato
Adobe PDF
|
1.01 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.