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.
2021
Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Amoroso, A.; An, Q.; Anita, ; Bai, Y.; Bakina, O.; Baldini Ferroli, R.; Balossino,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2481129
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