Sheng-Tian Xue

Evidence of sigma particle in J / psi ---> omega pi pi

Jing-Zhi Bai, Ze-Pu Mao, Jie Chi Yang, Y. K. Heng et autres

Based on a sample of 7.8 million BESI $J/\\psi$ events, the decay of $ J/\\psi \\to \\omega \\pi^+ \\pi^-$ is studied. A low mass enhancement in the $\\pi^+ \\pi^-$ invariant mass spectrum recoiling against $\\omega$ particle is clearly seen which does not …

Experimental study of hadron inclusive production in J / psi energy region

Bai Jingzhi, Bian Jianguo, Chai Zhengwei, Guang‐Pei Chen et autres

The mean multiplicities of mesons π±, π0, K±, Ks0, K*0, K*±, and φ and baryons p, Ξ±, and ∑± (1385) are measured for the first time at J/ψ region with 200,000 events collected at the BEPC with the BES detector. The results …

Measurement of the branching ratios for J / psi --> gamma pi0, gamma eta, gamma eta' --> 3gamma on the BES

Jing-Zhi Bai, Xiaonan Li, Ze-Pu Mao, Hong Shen et autres

Measurement of the Branching Ratios for J/ ψ → γπ 0 , γη '→3 γ on the BES

Bai Jingzhi, Bian Jianguo, Chai Zhengwei, Guang‐Pei Chen et autres

Decays of the J/ψ resonance into the three-photon final state are investigated. Branching ratios for the decays of J/ψ→γπ0 and J/ψ→γη' are determined to be Br(J/ψ→γπ0)=(4.6±1.1)×10-5 and Br(J/ψ→γη')=(4.12±0.82)—10-3. The ratio of the two decay widths, Γ(J/ψ→γη')/Γ(J/ψ→γη),is 4.79±0.85. This value agrees weM with …

Experimental study of f0(975) in J / psi decays

Jing-Zhi Bai, Xiaonan Li, Zepu Mao, Hong Shen et autres

Experimental measurement of the mass of the tau lepton at the Beijing Electron Positron Collider (BEPC)

Jing-Zhi Bai, Mao Ze-Pu, Pei‐Pei Xie, Ya-Qing Chen et autres

tau mass measurement from e mu, e pi and (mu pi, mu mu, pi pi) channels at BES/BEPC

Sheng-Tian Xue