We present an analysis of the process ψ(3686)→ω-ω¯+ (ω-→K-Λ, ω¯+→K+Λ¯, Λ→pπ-, Λ¯→p¯π+) based on a dataset of 448×106 ψ(3686) decays collected with the BESIII detector at the BEPCII electron-positron collider. The helicity amplitudes for the process ψ(3686)→ω-ω¯+ and the decay parameters of the subsequent decay ω-→K-Λ (ω¯+→K+Λ¯) are measured for the first time by a fit to the angular distribution of the complete decay chain, and the spin of the ω- is determined to be 3/2 for the first time since its discovery more than 50 years ago.
Model-Independent Determination of the Spin of the ω- And Its Polarization Alignment in ψ (3686) → ω-ω¯
Garzia I.;Mezzadri G.;
2021
Abstract
We present an analysis of the process ψ(3686)→ω-ω¯+ (ω-→K-Λ, ω¯+→K+Λ¯, Λ→pπ-, Λ¯→p¯π+) based on a dataset of 448×106 ψ(3686) decays collected with the BESIII detector at the BEPCII electron-positron collider. The helicity amplitudes for the process ψ(3686)→ω-ω¯+ and the decay parameters of the subsequent decay ω-→K-Λ (ω¯+→K+Λ¯) are measured for the first time by a fit to the angular distribution of the complete decay chain, and the spin of the ω- is determined to be 3/2 for the first time since its discovery more than 50 years ago.File in questo prodotto:
File | Dimensione | Formato | |
---|---|---|---|
PhysRevLett.126.092002.pdf
accesso aperto
Descrizione: versione editoriale
Tipologia:
Full text (versione editoriale)
Licenza:
Creative commons
Dimensione
715.77 kB
Formato
Adobe PDF
|
715.77 kB | Adobe PDF | Visualizza/Apri |
I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.