The decays J/ψ→ηSigma+Sigmabar¯ and ψ(3686)→ηSigma+Sigmabar¯ are observed for the first time, using (10087±44)×106 J/ψ and (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider. We determine the branching fractions of these two decays to be B(J/ψ→ηSigma+Sigmabar¯)=(6.34±0.21±0.37)×10-5 and B(ψ(3686)→ηSigma+Sigmabar¯)=(9.59±2.37±0.61)×10-6, where the first uncertainties are statistical and the second are systematic. The ratio of these two branching fractions is determined to be B(ψ(3686)→ηSigma+Sigmabar¯)B(J/ψ→ηSigma+Sigmabar¯)=(15.1±3.8)%, which is in agreement with the "12% rule
Observation of the J /ψ and ψ (3686) decays into η Sigma+ Sigmabar ¯
I. Garzia;
2022
Abstract
The decays J/ψ→ηSigma+Sigmabar¯ and ψ(3686)→ηSigma+Sigmabar¯ are observed for the first time, using (10087±44)×106 J/ψ and (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider. We determine the branching fractions of these two decays to be B(J/ψ→ηSigma+Sigmabar¯)=(6.34±0.21±0.37)×10-5 and B(ψ(3686)→ηSigma+Sigmabar¯)=(9.59±2.37±0.61)×10-6, where the first uncertainties are statistical and the second are systematic. The ratio of these two branching fractions is determined to be B(ψ(3686)→ηSigma+Sigmabar¯)B(J/ψ→ηSigma+Sigmabar¯)=(15.1±3.8)%, which is in agreement with the "12% ruleFile in questo prodotto:
File | Dimensione | Formato | |
---|---|---|---|
PhysRevD.106.112007.pdf
accesso aperto
Descrizione: Full text editoriale
Tipologia:
Full text (versione editoriale)
Licenza:
Creative commons
Dimensione
655.69 kB
Formato
Adobe PDF
|
655.69 kB | Adobe PDF | Visualizza/Apri |
I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.