We study the decays of Jpsi and psi(3686) to the final states Σ(1385)0Σbar(1385)0 and Ξ0Ξbar0 based on a single baryon tag method using data samples of (1310.6±7.0)x10^6 Jpsi and (447.9±2.9)x10^6 psi(3686) events collected with the BESIII detector at the BEPCII collider. The decays to Σ(1385)0Σbar(1385)0 are observed for the first time. The measured branching fractions of Jpsi and psi(3686) to Ξ0Ξbar0 are in good agreement with, and much more precise than, the previously published results. The angular parameters for these decays are also measured for the first time. The measured angular decay parameter for Jpsi --> Σ(1385)0Σbar(1385)0, alpha=-0.64±0.03±0.10, is found to be negative, different to the other decay processes in this measurement. In addition, the "12% rule" and isospin symmetry in the decays of Jpsi and psi(3686) to ΞΞbar and Σ(1385)Σbar(1385) are tested.
Study of Jpsi and psi(3686)-->Σ(1385)0Σbar(1385)0 and Ξ0Ξbar0
FARINELLI, Riccardo;GARZIA, Isabella;MEZZADRI, Giulio;
2017
Abstract
We study the decays of Jpsi and psi(3686) to the final states Σ(1385)0Σbar(1385)0 and Ξ0Ξbar0 based on a single baryon tag method using data samples of (1310.6±7.0)x10^6 Jpsi and (447.9±2.9)x10^6 psi(3686) events collected with the BESIII detector at the BEPCII collider. The decays to Σ(1385)0Σbar(1385)0 are observed for the first time. The measured branching fractions of Jpsi and psi(3686) to Ξ0Ξbar0 are in good agreement with, and much more precise than, the previously published results. The angular parameters for these decays are also measured for the first time. The measured angular decay parameter for Jpsi --> Σ(1385)0Σbar(1385)0, alpha=-0.64±0.03±0.10, is found to be negative, different to the other decay processes in this measurement. In addition, the "12% rule" and isospin symmetry in the decays of Jpsi and psi(3686) to ΞΞbar and Σ(1385)Σbar(1385) are tested.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
