1 First observation of J/ψ and ψ(2S) decaying to nK 0 S ¯ Λ + c.c.
نویسندگان
چکیده
M. Ablikim, J. Z. Bai, Y. Ban, X. Cai, H. F. Chen, H. S. Chen, H. X. Chen, J. C. Chen, Jin Chen, Y. B. Chen, Y. P. Chu, Y. S. Dai, L. Y. Diao, Z. Y. Deng, Q. F. Dong, S. X. Du, J. Fang, S. S. Fang, C. D. Fu, C. S. Gao, Y. N. Gao, K. Götzen, S. D. Gu, Y. T. Gu, Y. N. Guo, Z. J. Guo, F. A. Harris, K. L. He, M. He, Y. K. Heng, J. Hou, H. M. Hu, J. H. Hu T. Hu, G. S. Huang, X. T. Huang, X. B. Ji, X. S. Jiang, X. Y. Jiang, J. B. Jiao, D. P. Jin, S. Jin, Y. F. Lai, G. Li, H. B. Li, J. Li, R. Y. Li, S. M. Li, W. D. Li, W. G. Li, X. L. Li, X. N. Li, X. Q. Li, Y. F. Liang, H. B. Liao, B. J. Liu, C. X. Liu, F. Liu, Fang Liu, H. H. Liu, H. M. Liu, J. Liu, J. B. Liu, J. P. Liu, Jian Liu, Q. Liu, R. G. Liu, Z. A. Liu, Y. C. Lou, F. Lu, G. R. Lu, J. G. Lu, C. L. Luo, F. C. Ma, H. L. Ma, L. L. Ma , Q. M. Ma, Z. P. Mao, X. H. Mo, J. Nie, S. L. Olsen, K. J. Peters, R. G. Ping, N. D. Qi, H. Qin, J. F. Qiu, Z. Y. Ren, G. Rong, X. D. Ruan, L. Y. Shan, L. Shang, C. P. Shen, D. L. Shen, X. Y. Shen, H. Y. Sheng, H. S. Sun, S. S. Sun, Y. Z. Sun, Z. J. Sun, X. Tang, G. L. Tong, G. S. Varner, D. Y. Wang , L. Wang, L. L. Wang, L. S. Wang, M. Wang, P. Wang, P. L. Wang, W. F. Wang, Y. F. Wang, Z. Wang, Z. Y. Wang, Zheng Wang, C. L. Wei, D. H. Wei, Y. Weng, N. Wu, X. M. Xia, X. X. Xie, G. F. Xu, X. P. Xu, Y. Xu, M. L. Yan, H. X. Yang, Y. X. Yang, M. H. Ye, Y. X. Ye, G. W. Yu, C. Z. Yuan, Y. Yuan, S. L. Zang, Y. Zeng, B. X. Zhang, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. Q. Zhang, H. Y. Zhang, J. W. Zhang, J. Y. Zhang, S. H. Zhang, X. Y. Zhang, Yiyun Zhang, Z. X. Zhang, Z. P. Zhang, D. X. Zhao, J. W. Zhao, M. G. Zhao, P. P. Zhao, W. R. Zhao, Z. G. Zhao, H. Q. Zheng, J. P. Zheng, Z. P. Zheng, L. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, Z. A. Zhu, B. A. Zhuang, X. A. Zhuang, B. S. Zou.
منابع مشابه
ar X iv : 0 70 8 . 34 96 v 3 [ he p -
A wealth of charmonium states have recently been reported in B meson decays. (For one review, see Ref. [1].) Until recently, all such states were neutral, implying the possibility of at least some fraction of cc̄ in their wave functions. Recently, however, the Belle Collaboration [2] has reported a state produced in B → Kπψ(2S) in which the πψ(2S) system displays a resonance-like structure with ...
متن کاملar X iv : h ep - e x / 04 07 03 7 v 2 2 9 M ar 2 00 5 Observation of the decay ψ ( 2 S ) → K ∗ ( 892 ) K
Using 14 million ψ(2S) events collected with the BESII detector, branching fractions of ψ(2S) → K(892)K+c.c. and K(892)K 0 + c.c. are determined to be: B(ψ(2S) → K(892)K + c.c.) = (2.9 −1.7 ± 0.4) × 10 −5 and B(ψ(2S) → K(892)K 0 + c.c.) = (13.3 −2.7 ± 1.7)× 10 . The results confirm the violation of the “12% rule” for these two decay channels. A large isospin violation between the charged and ne...
متن کاملBes Results on J/ψ Decays and Charmonium Transitions
Results are reported based on samples of 58 million J/ψ and 14 million ψ(2S) decays obtained by the BESII experiment. Improved branching fraction measurements are determined, including branching fractions for J/ψ → πππ, ψ(2S) → πJ/ψ, ηJ/ψ, ππJ/ψ, anything J/ψ, and ψ(2S) → γχc1, γχc2 → γγJ/ψ. The decay J/ψ → ωππ is studied. At low ππ mass, a large, broad peak due to the σ is observed, and its po...
متن کاملJa n 20 05 Measurement of the angular distribution in p̄p → ψ ( 2 S ) → e + e −
We present the first measurement of the angular distribution for the exclusive process p̄p→ ψ(2S) → e+e− based on a sample of 6844 events collected by the Fermilab E835 experiment. We find that the angular distribution is well described by the expected functional form dN d cos θ ∝ 1 + λ cos2 θ∗, where θ∗ is the angle between the Preprint submitted to Elsevier Science 7 February 2008 antiproton a...
متن کاملMeasurement of the angular distribution in p̄p → ψ ( 2 S ) → e + e −
We present the first measurement of the angular distribution for the exclusive process p̄p→ ψ(2S) → e+e− based on a sample of 6844 events collected by the Fermilab E835 experiment. We find that the angular distribution is well described by the expected functional form dN d cos θ ∝ 1 + λ cos2 θ∗, where θ∗ is the angle between the Preprint submitted to Elsevier Science 28 February 2008 antiproton ...
متن کاملStudy of B → ψ(2S)K and B → ψ(2S)K ∗ (892) decays (CLEO Collaboration)
Color-suppressed decays of B mesons to final states with ψ(2S) mesons have been observed with the CLEO detector. The branching fractions for the decays B+ → ψ(2S)K+, B+ → ψ(2S)K∗(892)+, B0 → ψ(2S)K0, and B0 → ψ(2S)K∗(892)0 are measured to be (7.8±0.7±0.9)×10−4 , (9.2±1.9± 1.2)× 10−4, (5.0± 1.1± 0.6)× 10−4, and (7.6± 1.1± 1.0)× 10−4, respectively, where the first uncertainty is statistical and t...
متن کامل