Observation of the decay ψ(2S)→K∗(892)K¯+c.c

• Published in: Physics letters. B 2005-05, Vol.614 (1-2), p.37-43
• Main Authors: Ablikim, M., Bai, J.Z., Ban, Y., Bian, J.G., Chen, H.F., Chen, H.S., Chen, H.X., Chu, Y.P., Cui, X.Z., Dai, H.L., Dong, L.Y., Gao, Y.N., Gong, M.Y., Gong, W.X., Guo, Y.Q., Guo, Z.J., He, M., Heng, Y.K., Hu, H.M., Huang, X.P., Ji, X.B., Jia, Q.Y., Jiang, C.H., Jiang, X.S., Jin, D.P., Jin, S., Jin, Y., Li, H.H., Li, J.C., Li, Q.J., Li, R.Y., Li, X.Q., Li, X.S., Liang, Y.F., Liu, F., Liu, J.B., Liu, J.P., Lu, J.G., Luo, X.L., Ma, F.C., Ma, J.M., Ma, L.L., Ma, Q.M., Ma, X.Y., Mao, Z.P., Mo, X.H., Nie, Z.D., Qian, C.D., Qin, H., Ren, Z.Y., Rong, G., Shan, L.Y., Shen, X.Y., Sheng, H.Y., Shi, X., Sun, H.S., Sun, S.S., Tao, N., Tian, Y.R., Tong, G.L., Varner, G.S., Wang, J.Z., Wang, K., Wang, L.S., Wang, P., Wang, S.Z., Wang, Z.Y., Xu, G.F., Xu, Y., Yang, S.D., Ye, M., Yi, L.H., Yi, Z.Y., Yu, C.S., Yuan, C.Z., Yue, Q., Zeng, Yu, Zhang, B.X., Zhang, H.Y., Zhang, J., Zhang, Q.J., Zhang, Yiyun, Zhang, Z.Q., Zhao, D.X., Zhao, J.W., Zhao, M.G., Zhao, W.R., Zhao, Y.B., Zhao, Z.G., Zheng, J.P., Zheng, L.S., Zhong, X.C., Zhou, B.Q., Zhou, L., Zhou, N.F., Zhu, Q.M., Zhu, Y.C., Zhu, Y.S., Zhu, Z.A., Zou, B.S.
• Format: Article
• Language: English
• Subjects: Exact sciences and technology; Nuclear physics; Physics; The physics of elementary particles and fields
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2005.03.071

Using 14 million ψ(2S) events collected with the BESII detector, branching fractions of ψ(2S)→K∗(892)+K−+c.c. and K∗(892)0K¯0+c.c. are determined to be: B(ψ(2S)→K∗(892)+K−+c.c.)=(2.9−1.7+1.3±0.4)×10−5 and B(ψ(2S)→K∗(892)0K¯0+c.c.)=(13.3−2.7+2.4±1.7)×10−5. The results confirm the violation of the “12% rule” for these two decay channels. A large isospin violation between the charged and neutral modes is observed.