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Title: First observation of the isospin violating decay J/ψ→ΛΣ̄⁰+c.c.

Abstract

Using a sample of (225.2±2.8)×10⁶ J/ψ events collected with the BESIII detector, we present results of a study of J/ψ→γΛΛ¯¯¯ and report the first observation of the isospin violating decay J/ψ→ΛΣ¯¯¯⁰+c.c., in which Σ¯¯¯⁰ decays to γΛ¯¯¯. The measured branching fractions are B(J/ψ→Λ¯¯¯Σ⁰)=(1.46±0.11±0.12)×10⁻⁵ and B(J/ψ→ΛΣ¯¯¯⁰)=(1.37±0.12±0.11)×10⁻⁵. We search for Λ(1520)→γΛ decay, and find no evident signal, and an upper limit for the product branching fraction B(J/ψ→ΛΛ¯¯¯(1520)+c.c.)×B(Λ(1520)→γΛ)<4.1×10⁻⁶ is set at the 90% confidence level. We also report the observation of ηc→ΛΛ¯¯¯ in J/ψ→γηc, ηc→ΛΛ¯¯¯ and measure the branching fraction B(ηc→ΛΛ¯¯¯)=(1.16±0.12(stat)±0.19(syst)±0.28(PDG))×10⁻³.

Authors:
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Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1103128
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Journal Volume: 86 Journal Issue: 3; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cakir, O., Calcaterra, A., Cao, G. F., Cetin, S. A., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Ferroli, R. B., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Li, C. H., Li, Cheng, Li, Cui, Li, D. M., Li, F., Li, G., Li, H. B., Li, J. C., Li, K., Li, Lei, Li, N. B., Li, Q. J., Li, S. L., Li, W. D., Li, W. G., Li, X. L., Li, X. N., Li, X. Q., Li, X. R., Li, Z. B., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Liu, Fang, Liu, Feng, Liu, H., Liu, H. B., Liu, H. H., Liu, H. M., Liu, H. W., Liu, J. P., Liu, K. Y., Liu, Kai, Liu, Kun, Liu, P. L., Liu, S. B., Liu, X., Liu, X. H., Liu, Y., Liu, Y. B., Liu, Z. A., Liu, Zhiqiang, Liu, Zhiqing, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Ma, Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Morales, C. Morales, Motzko, C., Muchnoi, N. Yu., Muramatsu, H., Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Park, J. W., Pelizaeus, M., Peng, H. P., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schaefer, B. D., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, D. H., Sun, G. X., Sun, J. F., Sun, S. S., Sun, X. D., Sun, Y. J., Sun, Y. Z., Sun, Z. J., Sun, Z. T., Tang, C. J., Tang, X., Tang, X. F., Tapan, I., Thorndike, E. H., Tian, H. L., Toth, D., Ullrich, M., Varner, G. S., Wang, B., Wang, B. Q., Wang, K., Wang, L. L., Wang, L. S., Wang, M., Wang, P., Wang, P. L., Wang, Q., Wang, Q. J., Wang, S. G., Wang, X. L., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. Y., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., Zhang, J. Q., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., Zhang, S. H., Zhang, T. R., Zhang, X. J., Zhang, X. Y., Zhang, Y., Zhang, Y. H., Zhang, Y. S., Zhang, Z. P., Zhang, Z. Y., Zhao, G., Zhao, H. S., Zhao, J. W., Zhao, K. X., Zhao, Lei, Zhao, Ling, Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. C., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X. First observation of the isospin violating decay J/ψ→ΛΣ̄⁰+c.c.. United States: N. p., 2012. Web. https://doi.org/10.1103/PhysRevD.86.032008.
Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cakir, O., Calcaterra, A., Cao, G. F., Cetin, S. A., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Ferroli, R. B., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Li, C. H., Li, Cheng, Li, Cui, Li, D. M., Li, F., Li, G., Li, H. B., Li, J. C., Li, K., Li, Lei, Li, N. B., Li, Q. J., Li, S. L., Li, W. D., Li, W. G., Li, X. L., Li, X. N., Li, X. Q., Li, X. R., Li, Z. B., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Liu, Fang, Liu, Feng, Liu, H., Liu, H. B., Liu, H. H., Liu, H. M., Liu, H. W., Liu, J. P., Liu, K. Y., Liu, Kai, Liu, Kun, Liu, P. L., Liu, S. B., Liu, X., Liu, X. H., Liu, Y., Liu, Y. B., Liu, Z. A., Liu, Zhiqiang, Liu, Zhiqing, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Ma, Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Morales, C. Morales, Motzko, C., Muchnoi, N. Yu., Muramatsu, H., Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Park, J. W., Pelizaeus, M., Peng, H. P., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schaefer, B. D., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, D. H., Sun, G. X., Sun, J. F., Sun, S. S., Sun, X. D., Sun, Y. J., Sun, Y. Z., Sun, Z. J., Sun, Z. T., Tang, C. J., Tang, X., Tang, X. F., Tapan, I., Thorndike, E. H., Tian, H. L., Toth, D., Ullrich, M., Varner, G. S., Wang, B., Wang, B. Q., Wang, K., Wang, L. L., Wang, L. S., Wang, M., Wang, P., Wang, P. L., Wang, Q., Wang, Q. J., Wang, S. G., Wang, X. L., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. Y., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., Zhang, J. Q., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., Zhang, S. H., Zhang, T. R., Zhang, X. J., Zhang, X. Y., Zhang, Y., Zhang, Y. H., Zhang, Y. S., Zhang, Z. P., Zhang, Z. Y., Zhao, G., Zhao, H. S., Zhao, J. W., Zhao, K. X., Zhao, Lei, Zhao, Ling, Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. C., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., & Zuo, J. X. First observation of the isospin violating decay J/ψ→ΛΣ̄⁰+c.c.. United States. https://doi.org/10.1103/PhysRevD.86.032008
Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cakir, O., Calcaterra, A., Cao, G. F., Cetin, S. A., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Ferroli, R. B., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Li, C. H., Li, Cheng, Li, Cui, Li, D. M., Li, F., Li, G., Li, H. B., Li, J. C., Li, K., Li, Lei, Li, N. B., Li, Q. J., Li, S. L., Li, W. D., Li, W. G., Li, X. L., Li, X. N., Li, X. Q., Li, X. R., Li, Z. B., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Liu, Fang, Liu, Feng, Liu, H., Liu, H. B., Liu, H. H., Liu, H. M., Liu, H. W., Liu, J. P., Liu, K. Y., Liu, Kai, Liu, Kun, Liu, P. L., Liu, S. B., Liu, X., Liu, X. H., Liu, Y., Liu, Y. B., Liu, Z. A., Liu, Zhiqiang, Liu, Zhiqing, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Ma, Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Morales, C. Morales, Motzko, C., Muchnoi, N. Yu., Muramatsu, H., Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Park, J. W., Pelizaeus, M., Peng, H. P., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schaefer, B. D., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, D. H., Sun, G. X., Sun, J. F., Sun, S. S., Sun, X. D., Sun, Y. J., Sun, Y. Z., Sun, Z. J., Sun, Z. T., Tang, C. J., Tang, X., Tang, X. F., Tapan, I., Thorndike, E. H., Tian, H. L., Toth, D., Ullrich, M., Varner, G. S., Wang, B., Wang, B. Q., Wang, K., Wang, L. L., Wang, L. S., Wang, M., Wang, P., Wang, P. L., Wang, Q., Wang, Q. J., Wang, S. G., Wang, X. L., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. Y., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., Zhang, J. Q., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., Zhang, S. H., Zhang, T. R., Zhang, X. J., Zhang, X. Y., Zhang, Y., Zhang, Y. H., Zhang, Y. S., Zhang, Z. P., Zhang, Z. Y., Zhao, G., Zhao, H. S., Zhao, J. W., Zhao, K. X., Zhao, Lei, Zhao, Ling, Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. C., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X. Wed . "First observation of the isospin violating decay J/ψ→ΛΣ̄⁰+c.c.". United States. https://doi.org/10.1103/PhysRevD.86.032008.
@article{osti_1103128,
title = {First observation of the isospin violating decay J/ψ→ΛΣ̄⁰+c.c.},
author = {Ablikim, M. and Achasov, M. N. and Ambrose, D. J. and An, F. F. and An, Q. and An, Z. H. and Bai, J. Z. and Ban, Y. and Becker, J. and Berger, N. and Bertani, M. and Bian, J. M. and Boger, E. and Bondarenko, O. and Boyko, I. and Briere, R. A. and Bytev, V. and Cai, X. and Cakir, O. and Calcaterra, A. and Cao, G. F. and Cetin, S. A. and Chang, J. F. and Chelkov, G. and Chen, G. and Chen, H. S. and Chen, J. C. and Chen, M. L. and Chen, S. J. and Chen, Y. and Chen, Y. B. and Cheng, H. P. and Chu, Y. P. and Cronin-Hennessy, D. and Dai, H. L. and Dai, J. P. and Dedovich, D. and Deng, Z. Y. and Denig, A. and Denysenko, I. and Destefanis, M. and Ding, W. M. and Ding, Y. and Dong, L. Y. and Dong, M. Y. and Du, S. X. and Fang, J. and Fang, S. S. and Fava, L. and Feldbauer, F. and Feng, C. Q. and Ferroli, R. B. and Fu, C. D. and Fu, J. L. and Gao, Y. and Geng, C. and Goetzen, K. and Gong, W. X. and Gradl, W. and Greco, M. and Gu, M. H. and Gu, Y. T. and Guan, Y. H. and Guo, A. Q. and Guo, L. B. and Guo, Y. P. and Han, Y. L. and Hao, X. Q. and Harris, F. A. and He, K. L. and He, M. and He, Z. Y. and Held, T. and Heng, Y. K. and Hou, Z. L. and Hu, H. M. and Hu, J. F. and Hu, T. and Huang, B. and Huang, G. M. and Huang, J. S. and Huang, X. T. and Huang, Y. P. and Hussain, T. and Ji, C. S. and Ji, Q. and Ji, X. B. and Ji, X. L. and Jia, L. K. and Jiang, L. L. and Jiang, X. S. and Jiao, J. B. and Jiao, Z. and Jin, D. P. and Jin, S. and Jing, F. F. and Kalantar-Nayestanaki, N. and Kavatsyuk, M. and Kuehn, W. and Lai, W. and Lange, J. S. and Li, C. H. and Li, Cheng and Li, Cui and Li, D. M. and Li, F. and Li, G. and Li, H. B. and Li, J. C. and Li, K. and Li, Lei and Li, N. B. and Li, Q. J. and Li, S. L. and Li, W. D. and Li, W. G. and Li, X. L. and Li, X. N. and Li, X. Q. and Li, X. R. and Li, Z. B. and Liang, H. and Liang, Y. F. and Liang, Y. T. and Liao, G. R. and Liao, X. T. and Liu, B. J. and Liu, C. L. and Liu, C. X. and Liu, C. Y. and Liu, F. H. and Liu, Fang and Liu, Feng and Liu, H. and Liu, H. B. and Liu, H. H. and Liu, H. M. and Liu, H. W. and Liu, J. P. and Liu, K. Y. and Liu, Kai and Liu, Kun and Liu, P. L. and Liu, S. B. and Liu, X. and Liu, X. H. and Liu, Y. and Liu, Y. B. and Liu, Z. A. and Liu, Zhiqiang and Liu, Zhiqing and Loehner, H. and Lu, G. R. and Lu, H. J. and Lu, J. G. and Lu, Q. W. and Lu, X. R. and Lu, Y. P. and Luo, C. L. and Luo, M. X. and Luo, T. and Luo, X. L. and Lv, M. and Ma, C. L. and Ma, F. C. and Ma, H. L. and Ma, Q. M. and Ma, S. and Ma, T. and Ma, X. Y. and Ma, Y. and Maas, F. E. and Maggiora, M. and Malik, Q. A. and Mao, H. and Mao, Y. J. and Mao, Z. P. and Messchendorp, J. G. and Min, J. and Min, T. J. and Mitchell, R. E. and Mo, X. H. and Morales, C. Morales and Motzko, C. and Muchnoi, N. Yu. and Muramatsu, H. and Nefedov, Y. and Nicholson, C. and Nikolaev, I. B. and Ning, Z. and Olsen, S. L. and Ouyang, Q. and Pacetti, S. and Park, J. W. and Pelizaeus, M. and Peng, H. P. and Peters, K. and Ping, J. L. and Ping, R. G. and Poling, R. and Prencipe, E. and Qi, M. and Qian, S. and Qiao, C. F. and Qin, X. S. and Qin, Y. and Qin, Z. H. and Qiu, J. F. and Rashid, K. H. and Rong, G. and Ruan, X. D. and Sarantsev, A. and Schaefer, B. D. and Schulze, J. and Shao, M. and Shen, C. P. and Shen, X. Y. and Sheng, H. Y. and Shepherd, M. R. and Song, X. Y. and Spataro, S. and Spruck, B. and Sun, D. H. and Sun, G. X. and Sun, J. F. and Sun, S. S. and Sun, X. D. and Sun, Y. J. and Sun, Y. Z. and Sun, Z. J. and Sun, Z. T. and Tang, C. J. and Tang, X. and Tang, X. F. and Tapan, I. and Thorndike, E. H. and Tian, H. L. and Toth, D. and Ullrich, M. and Varner, G. S. and Wang, B. and Wang, B. Q. and Wang, K. and Wang, L. L. and Wang, L. S. and Wang, M. and Wang, P. and Wang, P. L. and Wang, Q. and Wang, Q. J. and Wang, S. G. and Wang, X. L. and Wang, Y. D. and Wang, Y. F. and Wang, Y. Q. and Wang, Z. and Wang, Z. G. and Wang, Z. Y. and Wei, D. H. and Weidenkaff, P. and Wen, Q. G. and Wen, S. P. and Werner, M. and Wiedner, U. and Wu, L. H. and Wu, N. and Wu, S. X. and Wu, W. and Wu, Z. and Xia, L. G. and Xiao, Z. J. and Xie, Y. G. and Xiu, Q. L. and Xu, G. F. and Xu, G. M. and Xu, H. and Xu, Q. J. and Xu, X. P. and Xu, Z. R. and Xue, F. and Xue, Z. and Yan, L. and Yan, W. B. and Yan, Y. H. and Yang, H. X. and Yang, Y. and Yang, Y. X. and Ye, H. and Ye, M. and Ye, M. H. and Yu, B. X. and Yu, C. X. and Yu, J. S. and Yu, S. P. and Yuan, C. Z. and Yuan, W. L. and Yuan, Y. and Zafar, A. A. and Zallo, A. and Zeng, Y. and Zhang, B. X. and Zhang, B. Y. and Zhang, C. C. and Zhang, D. H. and Zhang, H. H. and Zhang, H. Y. and Zhang, J. and Zhang, J. Q. and Zhang, J. W. and Zhang, J. Y. and Zhang, J. Z. and Zhang, S. H. and Zhang, T. R. and Zhang, X. J. and Zhang, X. Y. and Zhang, Y. and Zhang, Y. H. and Zhang, Y. S. and Zhang, Z. P. and Zhang, Z. Y. and Zhao, G. and Zhao, H. S. and Zhao, J. W. and Zhao, K. X. and Zhao, Lei and Zhao, Ling and Zhao, M. G. and Zhao, Q. and Zhao, S. J. and Zhao, T. C. and Zhao, X. H. and Zhao, Y. B. and Zhao, Z. G. and Zhemchugov, A. and Zheng, B. and Zheng, J. P. and Zheng, Y. H. and Zheng, Z. P. and Zhong, B. and Zhong, J. and Zhou, L. and Zhou, X. K. and Zhou, X. R. and Zhu, C. and Zhu, K. and Zhu, K. J. and Zhu, S. H. and Zhu, X. L. and Zhu, X. W. and Zhu, Y. C. and Zhu, Y. M. and Zhu, Y. S. and Zhu, Z. A. and Zhuang, J. and Zou, B. S. and Zou, J. H. and Zuo, J. X.},
abstractNote = {Using a sample of (225.2±2.8)×10⁶ J/ψ events collected with the BESIII detector, we present results of a study of J/ψ→γΛΛ¯¯¯ and report the first observation of the isospin violating decay J/ψ→ΛΣ¯¯¯⁰+c.c., in which Σ¯¯¯⁰ decays to γΛ¯¯¯. The measured branching fractions are B(J/ψ→Λ¯¯¯Σ⁰)=(1.46±0.11±0.12)×10⁻⁵ and B(J/ψ→ΛΣ¯¯¯⁰)=(1.37±0.12±0.11)×10⁻⁵. We search for Λ(1520)→γΛ decay, and find no evident signal, and an upper limit for the product branching fraction B(J/ψ→ΛΛ¯¯¯(1520)+c.c.)×B(Λ(1520)→γΛ)<4.1×10⁻⁶ is set at the 90% confidence level. We also report the observation of ηc→ΛΛ¯¯¯ in J/ψ→γηc, ηc→ΛΛ¯¯¯ and measure the branching fraction B(ηc→ΛΛ¯¯¯)=(1.16±0.12(stat)±0.19(syst)±0.28(PDG))×10⁻³.},
doi = {10.1103/PhysRevD.86.032008},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 3,
volume = 86,
place = {United States},
year = {2012},
month = {8}
}

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