Measurement of higher-order multipole amplitudes in ψ(3686)→γχc1,2 with χc1,2→γJ/ψ and search for the transition ηc(2S)→γJ/ψ

Ablikim, M.; Achasov, M. N.; Ai, X. C.; Albayrak, O.; Albrecht, M.; Ambrose, D. J.; Amoroso, A.; An, F. F.; An, Q.; Bai, J. Z.; Baldini Ferroli, R.; Ban, Y.; Bennett, D. W.; Bennett, J. V.; Bertani, M.; Bettoni, D.; Bian, J. M.; Bianchi, F.; Boger, E.; Boyko, I.; Briere, R. A.; Cai, H.; Cai, X.; Cakir, O.; Calcaterra, A.; Cao, G. F.; Cetin, S. A.; Chang, J. F.; Chelkov, G.; Chen, G.; Chen, H. S.; Chen, H. Y.; Chen, J. C.; Chen, M. L.; Chen, S.; Chen, S. J.; Chen, X.; Chen, X. R.; Chen, Y. B.; Cheng, H. P.; Chu, X. K.; Cibinetto, G.; Dai, H. L.; Dai, J. P.; Dbeyssi, A.; Dedovich, D.; Deng, Z. Y.; Denig, A.; Denysenko, I.; Destefanis, M.; De Mori, F.; Ding, Y.; Dong, C.; Dong, J.; Dong, L. Y.; Dong, M. Y.; Dou, Z. L.; Du, S. X.; Duan, P. F.; Fan, J. Z.; Fang, J.; Fang, S. S.; Fang, X.; Fang, Y.; Farinelli, R.; Fava, L.; Fedorov, O.; Feldbauer, F.; Felici, G.; Feng, C. Q.; Fioravanti, E.; Fritsch, M.; Fu, C. D.; Gao, Q.; Gao, X. L.; Gao, X. Y.; Gao, Y.; Gao, Z.; Garzia, I.; Goetzen, K.; Gong, L.; Gong, W. X.; Gradl, W.; Greco, M.; Gu, M. H.; Gu, Y. T.; Guan, Y. H.; Guo, A. Q.; Guo, L. B.; Guo, R. P.; Guo, Y.; Guo, Y. P.; Haddadi, Z.; Hafner, A.; Han, S.; Hao, X. Q.; Harris, F. A.; He, K. L.; Held, T.; Heng, Y. K.; Hou, Z. L.; Hu, C.; Hu, H. M.; Hu, J. F.; Hu, T.; Hu, Y.; Huang, G. S.; Huang, J. S.; Huang, X. T.; Huang, X. Z.; Huang, Y.; Huang, Z. L.; Hussain, T.; Ji, Q.; Ji, Q. P.; Ji, X. B.; Ji, X. L.; Jiang, L. W.; Jiang, X. S.; Jiang, X. Y.; Jiao, J. B.; Jiao, Z.; Jin, D. P.; Jin, S.; Johansson, T.; Julin, A.; Kalantar-Nayestanaki, N.; Kang, X. L.; Kang, X. S.; Kavatsyuk, M.; Ke, B. C.; Kiese, P.; Kliemt, R.; Kloss, B.; Kolcu, O. B.; Kopf, B.; Kornicer, M.; Kupsc, A.; Kühn, W.; Lange, J. S.; Lara, M.; Larin, P.; Leithoff, H.; Leng, C.; Li, C.; Li, Cheng; Li, D. M.; Li, F.; Li, F. Y.; Li, G.; Li, H. B.; Li, H. J.; Li, J. C.; Li, Jin; Li, K.; Li, K.; Li, Lei; Li, P. R.; Li, Q. Y.; Li, T.; Li, W. D.; Li, W. G.; Li, X. L.; Li, X. M.; Li, X. N.; Li, X. Q.; Li, Y. B.; Li, Z. B.; Liang, H.; Liang, J. J.; Liang, Y. F.; Liang, Y. T.; Liao, G. R.; Lin, D. X.; Liu, B.; Liu, B. J.; Liu, C. X.; Liu, D.; Liu, F. H.; Liu, Fang; Liu, Feng; Liu, H. B.; Liu, H. H.; Liu, H. H.; Liu, H. M.; Liu, J.; Liu, J. B.; Liu, J. P.; Liu, J. Y.; Liu, K.; Liu, K. Y.; Liu, L. D.; Liu, P. L.; Liu, Q.; Liu, S. B.; Liu, X.; Liu, Y. B.; Liu, Z. A.; Liu, Zhiqing; Loehner, H.; Lou, X. C.; Lu, H. J.; Lu, J. G.; Lu, Y.; Lu, Y. P.; Luo, C. L.; Luo, M. X.; Luo, T.; Luo, X. L.; Lyu, X. R.; Ma, F. C.; Ma, H. L.; Ma, L. L.; Ma, M. M.; Ma, Q. M.; Ma, T.; Ma, X. N.; Ma, X. Y.; Ma, Y. M.; Maas, F. E.; Maggiora, M.; Mao, Y. J.; Mao, Z. P.; Marcello, S.; Messchendorp, J. G.; Mezzadri, G.; Min, J.; Mitchell, R. E.; Mo, X. H.; Mo, Y. J.; Morales Morales, C.; Muchnoi, N. Yu.; Muramatsu, H.; Nefedov, Y.; Nerling, F.; Nikolaev, I. B.; Ning, Z.; Nisar, S.; Niu, S. L.; Niu, X. Y.; Olsen, S. L.; Ouyang, Q.; Pacetti, S.; Pan, Y.; Patteri, P.; Pelizaeus, M.; Peng, H. P.; Peters, K.; Pettersson, J.; Ping, J. L.; Ping, R. G.; Poling, R.; Prasad, V.; Qi, H. R.; Qi, M.; Qian, S.; Qiao, C. F.; Qin, L. Q.; Qin, N.; Qin, X. S.; Qin, Z. H.; Qiu, J. F.; Rashid, K. H.; Redmer, C. F.; Ripka, M.; Rong, G.; Rosner, Ch.; Ruan, X. D.; Sarantsev, A.; Savrié, M.; Schoenning, K.; Schumann, S.; Shan, W.; Shao, M.; Shen, C. P.; Shen, P. X.; Shen, X. Y.; Sheng, H. Y.; Shi, M.; Song, W. M.; Song, X. Y.; Sosio, S.; Spataro, S.; Sun, G. X.; Sun, J. F.; Sun, S. S.; Sun, X. H.; Sun, Y. J.; Sun, Y. Z.; Sun, Z. J.; Sun, Z. T.; Tang, C. J.; Tang, X.; Tapan, I.; Thorndike, E. H.; Tiemens, M.; Ullrich, M.; Uman, I.; Varner, G. S.; Wang, B.; Wang, B. L.; Wang, D.; Wang, D. Y.; Wang, K.; Wang, L. L.; Wang, L. S.; Wang, M.; Wang, P.; Wang, P. L.; Wang, S. G.; Wang, W.; Wang, W. P.; Wang, X. F.; Wang, Y.; Wang, Y. D.; Wang, Y. F.; Wang, Y. Q.; Wang, Z.; Wang, Z. G.; Wang, Z. H.; Wang, Z. Y.; Wang, Z. Y.; Weber, T.; Wei, D. H.; Wei, J. B.; Weidenkaff, P.; Wen, S. P.; Wiedner, U.; Wolke, M.; Wu, L. H.; Wu, L. J.; Wu, Z.; Xia, L.; Xia, L. G.; Xia, Y.; Xiao, D.; Xiao, H.; Xiao, Z. J.; Xie, Y. G.; Xiu, Q. L.; Xu, G. F.; Xu, J. J.; Xu, L.; Xu, Q. J.; Xu, Q. N.; Xu, X. P.; Yan, L.; Yan, W. B.; Yan, W. C.; Yan, Y. H.; Yang, H. J.; Yang, H. X.; Yang, L.; Yang, Y. X.; Ye, M.; Ye, M. H.; Yin, J. H.; Yu, B. X.; Yu, C. X.; Yu, J. S.; Yuan, C. Z.; Yuan, W. L.; Yuan, Y.; Yuncu, A.; Zafar, A. A.; Zallo, A.; Zeng, Y.; Zeng, Z.; Zhang, B. X.; Zhang, B. Y.; Zhang, C.; Zhang, C. C.; Zhang, D. H.; Zhang, H. H.; Zhang, H. Y.; Zhang, J.; Zhang, J. J.; Zhang, J. L.; Zhang, J. Q.; Zhang, J. W.; Zhang, J. Y.; Zhang, J. Z.; Zhang, K.; Zhang, L.; Zhang, S. Q.; Zhang, X. Y.; Zhang, Y.; Zhang, Y. H.; Zhang, Y. N.; Zhang, Y. T.; Zhang, Yu; Zhang, Z. H.; Zhang, Z. P.; Zhang, Z. Y.; Zhao, G.; Zhao, J. W.; Zhao, J. Y.; Zhao, J. Z.; Zhao, Lei; Zhao, Ling; Zhao, M. G.; Zhao, Q.; Zhao, Q. W.; Zhao, S. J.; Zhao, T. C.; Zhao, Y. B.; Zhao, Z. G.; Zhemchugov, A.; Zheng, B.; Zheng, J. P.; Zheng, W. J.; Zheng, Y. H.; Zhong, B.; Zhou, L.; Zhou, X.; Zhou, X. K.; Zhou, X. R.; Zhou, X. Y.; Zhu, K.; Zhu, K. J.; Zhu, S.; Zhu, S. H.; Zhu, X. L.; Zhu, Y. C.; Zhu, Y. S.; Zhu, Z. A.; Zhuang, J.; Zotti, L.; Zou, B. S.; Zou, J. H.

doi:10.1103/PhysRevD.95.072004

Title: Measurement of higher-order multipole amplitudes in $ψ (3686) \to γ χ_{c 1, 2}$ with $χ_{c 1, 2} \to γ J / ψ$ and search for the transition $η_{c} (2 S) \to γ J / ψ$

Abstract

Using 106 ×10⁶ ψ (3686) events collected with the BESIII detector, we measure multipole amplitudes for the decay ψ (3686) → γχ_c1,2 → γγ J/ψ beyond the dominant electric-dipole amplitudes. The normalized magnetic-quadrupole (M2) amplitude for ψ (3686) → γχ_c1,2 → γγ J/ψ and the normalized electric-octupole amplitudes for ψ ( 3686 ) → γχ_c2, χ_c2 → γJ/ψ are determined. The M2 amplitudes for ψ (3686) → γ χ_c1 and χ_c1,2 → γ J / ψ are found to differ significantly from zero and are consistent with theoretical predictions. We also obtain the ratios of M2 contributions of ψ ( 3686 ) and J /ψ decays to χ_c1,2, b$$1\atop{2}$$/ b$$2\atop{2}$$ = 1.35 ± 0.72 and a$$1\atop{2}$$/a$$2\atop{2}$$ = 0.617 ± 0.083 , which agree well with theoretical expectations. By considering the multipole contributions of χ c 1 , 2 , we measure the product branching fractions for the cascade decays ψ ( 3686 ) → γχ_c0,1,2 → γγJ/ψ and search for the process η_c (2S) → γJ/ψ through ψ ( 3686 ) → γη_c (2S). The product branching fraction for ψ (3686) → γχ_c0 → γγJ/ψ is 3σ larger than published measurements, while those of ψ (3686) → γχ_c1,2 → γγJ/ψ are consistent. In conclusion, no significant signal for the decay ψ ( 3686 ) → γη_c (2S) → γγJ/ψ is observed, and the upper limit of the product branching fraction at the 90% confidence level is determined.

Authors:: Ablikim, M.; Achasov, M. N.; Ai, X. C.; Albayrak, O.; Albrecht, M.; Ambrose, D. J.; Amoroso, A.; An, F. F.; An, Q.; Bai, J. Z.; Baldini Ferroli, R.; Ban, Y.; Bennett, D. W.; Bennett, J. V.; Bertani, M.; Bettoni, D.; Bian, J. M.; Bianchi, F.; Boger, E.; Boyko, I. more »« less

Publication Date:: Thu Apr 06 00:00:00 EDT 2017

Research Org.:: Carnegie Mellon Univ., Pittsburgh, PA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Org.:: BESIII Collaboration

OSTI Identifier:: 1424035

Alternate Identifier(s):: OSTI ID: 1350157

Grant/Contract Number:: SC0010118; FG02-05ER41374; SC-0010504; SC0012069

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review D

Additional Journal Information:: Journal Volume: 95; Journal Issue: 7; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Ablikim, M., Achasov, M. N., Ai, X. C., Albayrak, O., Albrecht, M., Ambrose, D. J., Amoroso, A., An, F. F., An, Q., Bai, J. Z., Baldini Ferroli, R., Ban, Y., Bennett, D. W., Bennett, J. V., Bertani, M., Bettoni, D., Bian, J. M., Bianchi, F., Boger, E., Boyko, I., Briere, R. A., Cai, H., Cai, X., Cakir, O., Calcaterra, A., Cao, G. F., Cetin, S. A., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, H. Y., Chen, J. C., Chen, M. L., Chen, S., Chen, S. J., Chen, X., Chen, X. R., Chen, Y. B., Cheng, H. P., Chu, X. K., Cibinetto, G., Dai, H. L., Dai, J. P., Dbeyssi, A., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., De Mori, F., Ding, Y., Dong, C., Dong, J., Dong, L. Y., Dong, M. Y., Dou, Z. L., Du, S. X., Duan, P. F., Fan, J. Z., Fang, J., Fang, S. S., Fang, X., Fang, Y., Farinelli, R., Fava, L., Fedorov, O., Feldbauer, F., Felici, G., Feng, C. Q., Fioravanti, E., Fritsch, M., Fu, C. D., Gao, Q., Gao, X. L., Gao, X. Y., Gao, Y., Gao, Z., Garzia, I., Goetzen, K., Gong, L., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, R. P., Guo, Y., Guo, Y. P., Haddadi, Z., Hafner, A., Han, S., Hao, X. Q., Harris, F. A., He, K. L., Held, T., Heng, Y. K., Hou, Z. L., Hu, C., Hu, H. M., Hu, J. F., Hu, T., Hu, Y., Huang, G. S., Huang, J. S., Huang, X. T., Huang, X. Z., Huang, Y., Huang, Z. L., Hussain, T., Ji, Q., Ji, Q. P., Ji, X. B., Ji, X. L., Jiang, L. W., Jiang, X. S., Jiang, X. Y., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Johansson, T., Julin, A., Kalantar-Nayestanaki, N., Kang, X. L., Kang, X. S., Kavatsyuk, M., Ke, B. C., Kiese, P., Kliemt, R., Kloss, B., Kolcu, O. B., Kopf, B., Kornicer, M., Kupsc, A., Kühn, W., Lange, J. S., Lara, M., Larin, P., Leithoff, H., Leng, C., Li, C., Li, Cheng, Li, D. M., Li, F., Li, F. Y., Li, G., Li, H. B., Li, H. J., Li, J. C., Li, Jin, Li, K., Li, K., Li, Lei, Li, P. R., Li, Q. Y., Li, T., Li, W. D., Li, W. G., Li, X. L., Li, X. M., Li, X. N., Li, X. Q., Li, Y. B., Li, Z. B., Liang, H., Liang, J. J., Liang, Y. F., Liang, Y. T., Liao, G. R., Lin, D. X., Liu, B., Liu, B. J., Liu, C. X., Liu, D., Liu, F. H., Liu, Fang, Liu, Feng, Liu, H. B., Liu, H. H., Liu, H. H., Liu, H. M., Liu, J., Liu, J. B., Liu, J. P., Liu, J. Y., Liu, K., Liu, K. Y., Liu, L. D., Liu, P. L., Liu, Q., Liu, S. B., Liu, X., Liu, Y. B., Liu, Z. A., Liu, Zhiqing, Loehner, H., Lou, X. C., Lu, H. J., Lu, J. G., Lu, Y., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lyu, X. R., Ma, F. C., Ma, H. L., Ma, L. L., Ma, M. M., Ma, Q. M., Ma, T., Ma, X. N., Ma, X. Y., Ma, Y. M., Maas, F. E., Maggiora, M., Mao, Y. J., Mao, Z. P., Marcello, S., Messchendorp, J. G., Mezzadri, G., Min, J., Mitchell, R. E., Mo, X. H., Mo, Y. J., Morales Morales, C., Muchnoi, N. Yu., Muramatsu, H., Nefedov, Y., Nerling, F., Nikolaev, I. B., Ning, Z., Nisar, S., Niu, S. L., Niu, X. Y., Olsen, S. L., Ouyang, Q., Pacetti, S., Pan, Y., Patteri, P., Pelizaeus, M., Peng, H. P., Peters, K., Pettersson, J., Ping, J. L., Ping, R. G., Poling, R., Prasad, V., Qi, H. R., Qi, M., Qian, S., Qiao, C. F., Qin, L. Q., Qin, N., Qin, X. S., Qin, Z. H., Qiu, J. F., Rashid, K. H., Redmer, C. F., Ripka, M., Rong, G., Rosner, Ch., Ruan, X. D., Sarantsev, A., Savrié, M., Schoenning, K., Schumann, S., Shan, W., Shao, M., Shen, C. P., Shen, P. X., Shen, X. Y., Sheng, H. Y., Shi, M., Song, W. M., Song, X. Y., Sosio, S., Spataro, S., Sun, G. X., Sun, J. F., Sun, S. S., Sun, X. H., Sun, Y. J., Sun, Y. Z., Sun, Z. J., Sun, Z. T., Tang, C. J., Tang, X., Tapan, I., Thorndike, E. H., Tiemens, M., Ullrich, M., Uman, I., Varner, G. S., Wang, B., Wang, B. L., Wang, D., Wang, D. Y., Wang, K., Wang, L. L., Wang, L. S., Wang, M., Wang, P., Wang, P. L., Wang, S. G., Wang, W., Wang, W. P., Wang, X. F., Wang, Y., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. H., Wang, Z. Y., Wang, Z. Y., Weber, T., Wei, D. H., Wei, J. B., Weidenkaff, P., Wen, S. P., Wiedner, U., Wolke, M., Wu, L. H., Wu, L. J., Wu, Z., Xia, L., Xia, L. G., Xia, Y., Xiao, D., Xiao, H., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, J. J., Xu, L., Xu, Q. J., Xu, Q. N., Xu, X. P., Yan, L., Yan, W. B., Yan, W. C., Yan, Y. H., Yang, H. J., Yang, H. X., Yang, L., Yang, Y. X., Ye, M., Ye, M. H., Yin, J. H., Yu, B. X., Yu, C. X., Yu, J. S., Yuan, C. Z., Yuan, W. L., Yuan, Y., Yuncu, A., Zafar, A. A., Zallo, A., Zeng, Y., Zeng, Z., Zhang, B. X., Zhang, B. Y., Zhang, C., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., Zhang, J. J., Zhang, J. L., Zhang, J. Q., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., Zhang, K., Zhang, L., Zhang, S. Q., Zhang, X. Y., Zhang, Y., Zhang, Y. H., Zhang, Y. N., Zhang, Y. T., Zhang, Yu, Zhang, Z. H., Zhang, Z. P., Zhang, Z. Y., Zhao, G., Zhao, J. W., Zhao, J. Y., Zhao, J. Z., Zhao, Lei, Zhao, Ling, Zhao, M. G., Zhao, Q., Zhao, Q. W., Zhao, S. J., Zhao, T. C., Zhao, Y. B., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, W. J., Zheng, Y. H., Zhong, B., Zhou, L., Zhou, X., Zhou, X. K., Zhou, X. R., Zhou, X. Y., Zhu, K., Zhu, K. J., Zhu, S., Zhu, S. H., Zhu, X. L., Zhu, Y. C., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zotti, L., Zou, B. S., and Zou, J. H. Measurement of higher-order multipole amplitudes in ψ(3686)→γχc1,2 with χc1,2→γJ/ψ and search for the transition ηc(2S)→γJ/ψ.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevD.95.072004.

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                    Ablikim, M., Achasov, M. N., Ai, X. C., Albayrak, O., Albrecht, M., Ambrose, D. J., Amoroso, A., An, F. F., An, Q., Bai, J. Z., Baldini Ferroli, R., Ban, Y., Bennett, D. W., Bennett, J. V., Bertani, M., Bettoni, D., Bian, J. M., Bianchi, F., Boger, E., Boyko, I., Briere, R. A., Cai, H., Cai, X., Cakir, O., Calcaterra, A., Cao, G. F., Cetin, S. A., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, H. Y., Chen, J. C., Chen, M. L., Chen, S., Chen, S. J., Chen, X., Chen, X. R., Chen, Y. B., Cheng, H. P., Chu, X. K., Cibinetto, G., Dai, H. L., Dai, J. P., Dbeyssi, A., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., De Mori, F., Ding, Y., Dong, C., Dong, J., Dong, L. Y., Dong, M. Y., Dou, Z. L., Du, S. X., Duan, P. F., Fan, J. Z., Fang, J., Fang, S. S., Fang, X., Fang, Y., Farinelli, R., Fava, L., Fedorov, O., Feldbauer, F., Felici, G., Feng, C. Q., Fioravanti, E., Fritsch, M., Fu, C. D., Gao, Q., Gao, X. L., Gao, X. Y., Gao, Y., Gao, Z., Garzia, I., Goetzen, K., Gong, L., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, R. P., Guo, Y., Guo, Y. P., Haddadi, Z., Hafner, A., Han, S., Hao, X. Q., Harris, F. A., He, K. L., Held, T., Heng, Y. K., Hou, Z. L., Hu, C., Hu, H. M., Hu, J. F., Hu, T., Hu, Y., Huang, G. S., Huang, J. S., Huang, X. T., Huang, X. Z., Huang, Y., Huang, Z. L., Hussain, T., Ji, Q., Ji, Q. P., Ji, X. B., Ji, X. L., Jiang, L. W., Jiang, X. S., Jiang, X. Y., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Johansson, T., Julin, A., Kalantar-Nayestanaki, N., Kang, X. L., Kang, X. S., Kavatsyuk, M., Ke, B. C., Kiese, P., Kliemt, R., Kloss, B., Kolcu, O. B., Kopf, B., Kornicer, M., Kupsc, A., Kühn, W., Lange, J. S., Lara, M., Larin, P., Leithoff, H., Leng, C., Li, C., Li, Cheng, Li, D. M., Li, F., Li, F. Y., Li, G., Li, H. B., Li, H. J., Li, J. C., Li, Jin, Li, K., Li, K., Li, Lei, Li, P. R., Li, Q. Y., Li, T., Li, W. D., Li, W. G., Li, X. L., Li, X. M., Li, X. N., Li, X. Q., Li, Y. B., Li, Z. B., Liang, H., Liang, J. J., Liang, Y. F., Liang, Y. T., Liao, G. R., Lin, D. X., Liu, B., Liu, B. J., Liu, C. X., Liu, D., Liu, F. H., Liu, Fang, Liu, Feng, Liu, H. B., Liu, H. H., Liu, H. H., Liu, H. M., Liu, J., Liu, J. B., Liu, J. P., Liu, J. Y., Liu, K., Liu, K. Y., Liu, L. D., Liu, P. L., Liu, Q., Liu, S. B., Liu, X., Liu, Y. B., Liu, Z. A., Liu, Zhiqing, Loehner, H., Lou, X. C., Lu, H. J., Lu, J. G., Lu, Y., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lyu, X. R., Ma, F. C., Ma, H. L., Ma, L. L., Ma, M. M., Ma, Q. M., Ma, T., Ma, X. N., Ma, X. Y., Ma, Y. M., Maas, F. E., Maggiora, M., Mao, Y. J., Mao, Z. P., Marcello, S., Messchendorp, J. G., Mezzadri, G., Min, J., Mitchell, R. E., Mo, X. H., Mo, Y. J., Morales Morales, C., Muchnoi, N. Yu., Muramatsu, H., Nefedov, Y., Nerling, F., Nikolaev, I. B., Ning, Z., Nisar, S., Niu, S. L., Niu, X. Y., Olsen, S. L., Ouyang, Q., Pacetti, S., Pan, Y., Patteri, P., Pelizaeus, M., Peng, H. P., Peters, K., Pettersson, J., Ping, J. L., Ping, R. G., Poling, R., Prasad, V., Qi, H. R., Qi, M., Qian, S., Qiao, C. F., Qin, L. Q., Qin, N., Qin, X. S., Qin, Z. H., Qiu, J. F., Rashid, K. H., Redmer, C. F., Ripka, M., Rong, G., Rosner, Ch., Ruan, X. D., Sarantsev, A., Savrié, M., Schoenning, K., Schumann, S., Shan, W., Shao, M., Shen, C. P., Shen, P. X., Shen, X. Y., Sheng, H. Y., Shi, M., Song, W. M., Song, X. Y., Sosio, S., Spataro, S., Sun, G. X., Sun, J. F., Sun, S. S., Sun, X. H., Sun, Y. J., Sun, Y. Z., Sun, Z. J., Sun, Z. T., Tang, C. J., Tang, X., Tapan, I., Thorndike, E. H., Tiemens, M., Ullrich, M., Uman, I., Varner, G. S., Wang, B., Wang, B. L., Wang, D., Wang, D. Y., Wang, K., Wang, L. L., Wang, L. S., Wang, M., Wang, P., Wang, P. L., Wang, S. G., Wang, W., Wang, W. P., Wang, X. F., Wang, Y., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. H., Wang, Z. Y., Wang, Z. Y., Weber, T., Wei, D. H., Wei, J. B., Weidenkaff, P., Wen, S. P., Wiedner, U., Wolke, M., Wu, L. H., Wu, L. J., Wu, Z., Xia, L., Xia, L. G., Xia, Y., Xiao, D., Xiao, H., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, J. J., Xu, L., Xu, Q. J., Xu, Q. N., Xu, X. P., Yan, L., Yan, W. B., Yan, W. C., Yan, Y. H., Yang, H. J., Yang, H. X., Yang, L., Yang, Y. X., Ye, M., Ye, M. H., Yin, J. H., Yu, B. X., Yu, C. X., Yu, J. S., Yuan, C. Z., Yuan, W. L., Yuan, Y., Yuncu, A., Zafar, A. A., Zallo, A., Zeng, Y., Zeng, Z., Zhang, B. X., Zhang, B. Y., Zhang, C., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., Zhang, J. J., Zhang, J. L., Zhang, J. Q., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., Zhang, K., Zhang, L., Zhang, S. Q., Zhang, X. Y., Zhang, Y., Zhang, Y. H., Zhang, Y. N., Zhang, Y. T., Zhang, Yu, Zhang, Z. H., Zhang, Z. P., Zhang, Z. Y., Zhao, G., Zhao, J. W., Zhao, J. Y., Zhao, J. Z., Zhao, Lei, Zhao, Ling, Zhao, M. G., Zhao, Q., Zhao, Q. W., Zhao, S. J., Zhao, T. C., Zhao, Y. B., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, W. J., Zheng, Y. H., Zhong, B., Zhou, L., Zhou, X., Zhou, X. K., Zhou, X. R., Zhou, X. Y., Zhu, K., Zhu, K. J., Zhu, S., Zhu, S. H., Zhu, X. L., Zhu, Y. C., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zotti, L., Zou, B. S., & Zou, J. H. Measurement of higher-order multipole amplitudes in ψ(3686)→γχc1,2 with χc1,2→γJ/ψ and search for the transition ηc(2S)→γJ/ψ.  United States.  https://doi.org/10.1103/PhysRevD.95.072004

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                    Ablikim, M., Achasov, M. N., Ai, X. C., Albayrak, O., Albrecht, M., Ambrose, D. J., Amoroso, A., An, F. F., An, Q., Bai, J. Z., Baldini Ferroli, R., Ban, Y., Bennett, D. W., Bennett, J. V., Bertani, M., Bettoni, D., Bian, J. M., Bianchi, F., Boger, E., Boyko, I., Briere, R. A., Cai, H., Cai, X., Cakir, O., Calcaterra, A., Cao, G. F., Cetin, S. A., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, H. Y., Chen, J. C., Chen, M. L., Chen, S., Chen, S. J., Chen, X., Chen, X. R., Chen, Y. B., Cheng, H. P., Chu, X. K., Cibinetto, G., Dai, H. L., Dai, J. P., Dbeyssi, A., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., De Mori, F., Ding, Y., Dong, C., Dong, J., Dong, L. Y., Dong, M. Y., Dou, Z. L., Du, S. X., Duan, P. F., Fan, J. Z., Fang, J., Fang, S. S., Fang, X., Fang, Y., Farinelli, R., Fava, L., Fedorov, O., Feldbauer, F., Felici, G., Feng, C. Q., Fioravanti, E., Fritsch, M., Fu, C. D., Gao, Q., Gao, X. L., Gao, X. Y., Gao, Y., Gao, Z., Garzia, I., Goetzen, K., Gong, L., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, R. P., Guo, Y., Guo, Y. P., Haddadi, Z., Hafner, A., Han, S., Hao, X. Q., Harris, F. A., He, K. L., Held, T., Heng, Y. K., Hou, Z. L., Hu, C., Hu, H. M., Hu, J. F., Hu, T., Hu, Y., Huang, G. S., Huang, J. S., Huang, X. T., Huang, X. Z., Huang, Y., Huang, Z. L., Hussain, T., Ji, Q., Ji, Q. P., Ji, X. B., Ji, X. L., Jiang, L. W., Jiang, X. S., Jiang, X. Y., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Johansson, T., Julin, A., Kalantar-Nayestanaki, N., Kang, X. L., Kang, X. S., Kavatsyuk, M., Ke, B. C., Kiese, P., Kliemt, R., Kloss, B., Kolcu, O. B., Kopf, B., Kornicer, M., Kupsc, A., Kühn, W., Lange, J. S., Lara, M., Larin, P., Leithoff, H., Leng, C., Li, C., Li, Cheng, Li, D. M., Li, F., Li, F. Y., Li, G., Li, H. B., Li, H. J., Li, J. C., Li, Jin, Li, K., Li, K., Li, Lei, Li, P. R., Li, Q. Y., Li, T., Li, W. D., Li, W. G., Li, X. L., Li, X. M., Li, X. N., Li, X. Q., Li, Y. B., Li, Z. B., Liang, H., Liang, J. J., Liang, Y. F., Liang, Y. T., Liao, G. R., Lin, D. X., Liu, B., Liu, B. J., Liu, C. X., Liu, D., Liu, F. H., Liu, Fang, Liu, Feng, Liu, H. B., Liu, H. H., Liu, H. H., Liu, H. M., Liu, J., Liu, J. B., Liu, J. P., Liu, J. Y., Liu, K., Liu, K. Y., Liu, L. D., Liu, P. L., Liu, Q., Liu, S. B., Liu, X., Liu, Y. B., Liu, Z. A., Liu, Zhiqing, Loehner, H., Lou, X. C., Lu, H. J., Lu, J. G., Lu, Y., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lyu, X. R., Ma, F. C., Ma, H. L., Ma, L. L., Ma, M. M., Ma, Q. M., Ma, T., Ma, X. N., Ma, X. Y., Ma, Y. M., Maas, F. E., Maggiora, M., Mao, Y. J., Mao, Z. P., Marcello, S., Messchendorp, J. G., Mezzadri, G., Min, J., Mitchell, R. E., Mo, X. H., Mo, Y. J., Morales Morales, C., Muchnoi, N. Yu., Muramatsu, H., Nefedov, Y., Nerling, F., Nikolaev, I. B., Ning, Z., Nisar, S., Niu, S. L., Niu, X. Y., Olsen, S. L., Ouyang, Q., Pacetti, S., Pan, Y., Patteri, P., Pelizaeus, M., Peng, H. P., Peters, K., Pettersson, J., Ping, J. L., Ping, R. G., Poling, R., Prasad, V., Qi, H. R., Qi, M., Qian, S., Qiao, C. F., Qin, L. Q., Qin, N., Qin, X. S., Qin, Z. H., Qiu, J. F., Rashid, K. H., Redmer, C. F., Ripka, M., Rong, G., Rosner, Ch., Ruan, X. D., Sarantsev, A., Savrié, M., Schoenning, K., Schumann, S., Shan, W., Shao, M., Shen, C. P., Shen, P. X., Shen, X. Y., Sheng, H. Y., Shi, M., Song, W. M., Song, X. Y., Sosio, S., Spataro, S., Sun, G. X., Sun, J. F., Sun, S. S., Sun, X. H., Sun, Y. J., Sun, Y. Z., Sun, Z. J., Sun, Z. T., Tang, C. J., Tang, X., Tapan, I., Thorndike, E. H., Tiemens, M., Ullrich, M., Uman, I., Varner, G. S., Wang, B., Wang, B. L., Wang, D., Wang, D. Y., Wang, K., Wang, L. L., Wang, L. S., Wang, M., Wang, P., Wang, P. L., Wang, S. G., Wang, W., Wang, W. P., Wang, X. F., Wang, Y., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. H., Wang, Z. Y., Wang, Z. Y., Weber, T., Wei, D. H., Wei, J. B., Weidenkaff, P., Wen, S. P., Wiedner, U., Wolke, M., Wu, L. H., Wu, L. J., Wu, Z., Xia, L., Xia, L. G., Xia, Y., Xiao, D., Xiao, H., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, J. J., Xu, L., Xu, Q. J., Xu, Q. N., Xu, X. P., Yan, L., Yan, W. B., Yan, W. C., Yan, Y. H., Yang, H. J., Yang, H. X., Yang, L., Yang, Y. X., Ye, M., Ye, M. H., Yin, J. H., Yu, B. X., Yu, C. X., Yu, J. S., Yuan, C. Z., Yuan, W. L., Yuan, Y., Yuncu, A., Zafar, A. A., Zallo, A., Zeng, Y., Zeng, Z., Zhang, B. X., Zhang, B. Y., Zhang, C., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., Zhang, J. J., Zhang, J. L., Zhang, J. Q., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., Zhang, K., Zhang, L., Zhang, S. Q., Zhang, X. Y., Zhang, Y., Zhang, Y. H., Zhang, Y. N., Zhang, Y. T., Zhang, Yu, Zhang, Z. H., Zhang, Z. P., Zhang, Z. Y., Zhao, G., Zhao, J. W., Zhao, J. Y., Zhao, J. Z., Zhao, Lei, Zhao, Ling, Zhao, M. G., Zhao, Q., Zhao, Q. W., Zhao, S. J., Zhao, T. C., Zhao, Y. B., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, W. J., Zheng, Y. H., Zhong, B., Zhou, L., Zhou, X., Zhou, X. K., Zhou, X. R., Zhou, X. Y., Zhu, K., Zhu, K. J., Zhu, S., Zhu, S. H., Zhu, X. L., Zhu, Y. C., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zotti, L., Zou, B. S., and Zou, J. H. Thu .  
"Measurement of higher-order multipole amplitudes in ψ(3686)→γχc1,2 with χc1,2→γJ/ψ and search for the transition ηc(2S)→γJ/ψ".  United States.  https://doi.org/10.1103/PhysRevD.95.072004.  https://www.osti.gov/servlets/purl/1424035.

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@article{osti_1424035,

  title        = {Measurement of higher-order multipole amplitudes in ψ(3686)→γχc1,2 with χc1,2→γJ/ψ and search for the transition ηc(2S)→γJ/ψ},

  author       = {Ablikim, M. and Achasov, M. N. and Ai, X. C. and Albayrak, O. and Albrecht, M. and Ambrose, D. J. and Amoroso, A. and An, F. F. and An, Q. and Bai, J. Z. and Baldini Ferroli, R. and Ban, Y. and Bennett, D. W. and Bennett, J. V. and Bertani, M. and Bettoni, D. and Bian, J. M. and Bianchi, F. and Boger, E. and Boyko, I. and Briere, R. A. and Cai, H. 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, H. Y. and Chen, J. C. and Chen, M. L. and Chen, S. and Chen, S. J. and Chen, X. and Chen, X. R. and Chen, Y. B. and Cheng, H. P. and Chu, X. K. and Cibinetto, G. and Dai, H. L. and Dai, J. P. and Dbeyssi, A. and Dedovich, D. and Deng, Z. Y. and Denig, A. and Denysenko, I. and Destefanis, M. and De Mori, F. and Ding, Y. and Dong, C. and Dong, J. and Dong, L. Y. and Dong, M. Y. and Dou, Z. L. and Du, S. X. and Duan, P. F. and Fan, J. Z. and Fang, J. and Fang, S. S. and Fang, X. and Fang, Y. and Farinelli, R. and Fava, L. and Fedorov, O. and Feldbauer, F. and Felici, G. and Feng, C. Q. and Fioravanti, E. and Fritsch, M. and Fu, C. D. and Gao, Q. and Gao, X. L. and Gao, X. Y. and Gao, Y. and Gao, Z. and Garzia, I. and Goetzen, K. and Gong, L. 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, R. P. and Guo, Y. and Guo, Y. P. and Haddadi, Z. and Hafner, A. and Han, S. and Hao, X. Q. and Harris, F. A. and He, K. L. and Held, T. and Heng, Y. K. and Hou, Z. L. and Hu, C. and Hu, H. M. and Hu, J. F. and Hu, T. and Hu, Y. and Huang, G. S. and Huang, J. S. and Huang, X. T. and Huang, X. Z. and Huang, Y. and Huang, Z. L. and Hussain, T. and Ji, Q. and Ji, Q. P. and Ji, X. B. and Ji, X. L. and Jiang, L. W. and Jiang, X. S. and Jiang, X. Y. and Jiao, J. B. and Jiao, Z. and Jin, D. P. and Jin, S. and Johansson, T. and Julin, A. and Kalantar-Nayestanaki, N. and Kang, X. L. and Kang, X. S. and Kavatsyuk, M. and Ke, B. C. and Kiese, P. and Kliemt, R. and Kloss, B. and Kolcu, O. B. and Kopf, B. and Kornicer, M. and Kupsc, A. and Kühn, W. and Lange, J. S. and Lara, M. and Larin, P. and Leithoff, H. and Leng, C. and Li, C. and Li, Cheng and Li, D. M. and Li, F. and Li, F. Y. and Li, G. and Li, H. B. and Li, H. J. and Li, J. C. and Li, Jin and Li, K. and Li, K. and Li, Lei and Li, P. R. and Li, Q. Y. and Li, T. and Li, W. D. and Li, W. G. and Li, X. L. and Li, X. M. and Li, X. N. and Li, X. Q. and Li, Y. B. and Li, Z. B. and Liang, H. and Liang, J. J. and Liang, Y. F. and Liang, Y. T. and Liao, G. R. and Lin, D. X. and Liu, B. and Liu, B. J. and Liu, C. X. and Liu, D. and Liu, F. H. and Liu, Fang and Liu, Feng and Liu, H. B. and Liu, H. H. and Liu, H. H. and Liu, H. M. and Liu, J. and Liu, J. B. and Liu, J. P. and Liu, J. Y. and Liu, K. and Liu, K. Y. and Liu, L. D. and Liu, P. L. and Liu, Q. and Liu, S. B. and Liu, X. and Liu, Y. B. and Liu, Z. A. and Liu, Zhiqing and Loehner, H. and Lou, X. C. and Lu, H. J. and Lu, J. G. and Lu, Y. and Lu, Y. P. and Luo, C. L. and Luo, M. X. and Luo, T. and Luo, X. L. and Lyu, X. R. and Ma, F. C. and Ma, H. L. and Ma, L. L. and Ma, M. M. and Ma, Q. M. and Ma, T. and Ma, X. N. and Ma, X. Y. and Ma, Y. M. and Maas, F. E. and Maggiora, M. and Mao, Y. J. and Mao, Z. P. and Marcello, S. and Messchendorp, J. G. and Mezzadri, G. and Min, J. and Mitchell, R. E. and Mo, X. H. and Mo, Y. J. and Morales Morales, C. and Muchnoi, N. Yu. and Muramatsu, H. and Nefedov, Y. and Nerling, F. and Nikolaev, I. B. and Ning, Z. and Nisar, S. and Niu, S. L. and Niu, X. Y. and Olsen, S. L. and Ouyang, Q. and Pacetti, S. and Pan, Y. and Patteri, P. and Pelizaeus, M. and Peng, H. P. and Peters, K. and Pettersson, J. and Ping, J. L. and Ping, R. G. and Poling, R. and Prasad, V. and Qi, H. R. and Qi, M. and Qian, S. and Qiao, C. F. and Qin, L. Q. and Qin, N. and Qin, X. S. and Qin, Z. H. and Qiu, J. F. and Rashid, K. H. and Redmer, C. F. and Ripka, M. and Rong, G. and Rosner, Ch. and Ruan, X. D. and Sarantsev, A. and Savrié, M. and Schoenning, K. and Schumann, S. and Shan, W. and Shao, M. and Shen, C. P. and Shen, P. X. and Shen, X. Y. and Sheng, H. Y. and Shi, M. and Song, W. M. and Song, X. Y. and Sosio, S. and Spataro, S. and Sun, G. X. and Sun, J. F. and Sun, S. S. and Sun, X. H. and Sun, Y. J. and Sun, Y. Z. and Sun, Z. J. and Sun, Z. T. and Tang, C. J. and Tang, X. and Tapan, I. and Thorndike, E. H. and Tiemens, M. and Ullrich, M. and Uman, I. and Varner, G. S. and Wang, B. and Wang, B. L. and Wang, D. and Wang, D. Y. and Wang, K. and Wang, L. L. and Wang, L. S. and Wang, M. and Wang, P. and Wang, P. L. and Wang, S. G. and Wang, W. and Wang, W. P. and Wang, X. F. and Wang, Y. and Wang, Y. D. and Wang, Y. F. and Wang, Y. Q. and Wang, Z. and Wang, Z. G. and Wang, Z. H. and Wang, Z. Y. and Wang, Z. Y. and Weber, T. and Wei, D. H. and Wei, J. B. and Weidenkaff, P. and Wen, S. P. and Wiedner, U. and Wolke, M. and Wu, L. H. and Wu, L. J. and Wu, Z. and Xia, L. and Xia, L. G. and Xia, Y. and Xiao, D. and Xiao, H. and Xiao, Z. J. and Xie, Y. G. and Xiu, Q. L. and Xu, G. F. and Xu, J. J. and Xu, L. and Xu, Q. J. and Xu, Q. N. and Xu, X. P. and Yan, L. and Yan, W. B. and Yan, W. C. and Yan, Y. H. and Yang, H. J. and Yang, H. X. and Yang, L. and Yang, Y. X. and Ye, M. and Ye, M. H. and Yin, J. H. and Yu, B. X. and Yu, C. X. and Yu, J. S. and Yuan, C. Z. and Yuan, W. L. and Yuan, Y. and Yuncu, A. and Zafar, A. A. and Zallo, A. and Zeng, Y. and Zeng, Z. and Zhang, B. X. and Zhang, B. Y. and Zhang, C. and Zhang, C. C. and Zhang, D. H. and Zhang, H. H. and Zhang, H. Y. and Zhang, J. and Zhang, J. J. and Zhang, J. L. and Zhang, J. Q. and Zhang, J. W. and Zhang, J. Y. and Zhang, J. Z. and Zhang, K. and Zhang, L. and Zhang, S. Q. and Zhang, X. Y. and Zhang, Y. and Zhang, Y. H. and Zhang, Y. N. and Zhang, Y. T. and Zhang, Yu and Zhang, Z. H. and Zhang, Z. P. and Zhang, Z. Y. and Zhao, G. and Zhao, J. W. and Zhao, J. Y. and Zhao, J. Z. and Zhao, Lei and Zhao, Ling and Zhao, M. G. and Zhao, Q. and Zhao, Q. W. and Zhao, S. J. and Zhao, T. C. and Zhao, Y. B. and Zhao, Z. G. and Zhemchugov, A. and Zheng, B. and Zheng, J. P. and Zheng, W. J. and Zheng, Y. H. and Zhong, B. and Zhou, L. and Zhou, X. and Zhou, X. K. and Zhou, X. R. and Zhou, X. Y. and Zhu, K. and Zhu, K. J. and Zhu, S. and Zhu, S. H. and Zhu, X. L. and Zhu, Y. C. and Zhu, Y. S. and Zhu, Z. A. and Zhuang, J. and Zotti, L. and Zou, B. S. and Zou, J. H.},

  abstractNote = {Using 106 ×106 ψ (3686) events collected with the BESIII detector, we measure multipole amplitudes for the decay ψ (3686) → γχc1,2 → γγ J/ψ beyond the dominant electric-dipole amplitudes. The normalized magnetic-quadrupole (M2) amplitude for ψ (3686) → γχc1,2 → γγ J/ψ and the normalized electric-octupole amplitudes for ψ ( 3686 ) → γχc2, χc2 → γJ/ψ are determined. The M2 amplitudes for ψ (3686) → γ χc1 and χc1,2 → γ J / ψ are found to differ significantly from zero and are consistent with theoretical predictions. We also obtain the ratios of M2 contributions of ψ ( 3686 ) and J /ψ decays to χc1,2, b$1\atop{2}$/ b$2\atop{2}$ = 1.35 ± 0.72 and a$1\atop{2}$/a$2\atop{2}$ = 0.617 ± 0.083 , which agree well with theoretical expectations. By considering the multipole contributions of χ c 1 , 2 , we measure the product branching fractions for the cascade decays ψ ( 3686 ) → γχc0,1,2 → γγJ/ψ and search for the process ηc (2S) → γJ/ψ through ψ ( 3686 ) → γηc (2S). The product branching fraction for ψ (3686) → γχc0 → γγJ/ψ is 3σ larger than published measurements, while those of ψ (3686) → γχc1,2 → γγJ/ψ are consistent. In conclusion, no significant signal for the decay ψ ( 3686 ) → γηc (2S) → γγJ/ψ is observed, and the upper limit of the product branching fraction at the 90% confidence level is determined.},

  doi          = {10.1103/PhysRevD.95.072004},

  journal      = {Physical Review D},

  number       = 7,

  volume       = 95,

  place        = {United States},

  year         = {Thu Apr 06 00:00:00 EDT 2017},

  month        = {Thu Apr 06 00:00:00 EDT 2017}

}

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Karl, Gabriel; Meshkov, Sydney; Rosner, Jonathan L.
Physical Review Letters, Vol. 45, Issue 4
DOI: 10.1103/PhysRevLett.45.215

Spin tests for intermediate states in radiative $ψ^{'} (3684)$ decay chains
journal, June 1976

Kabir, P. K.; Hey, A. J. G.
Physical Review D, Vol. 13, Issue 11
DOI: 10.1103/PhysRevD.13.3161

Search for hadronic transition $χ_{c J} \to η_{c} π^{+} π^{-}$ and observation of $χ_{c J} \to K \bar{K} π π π$
journal, January 2013

Ablikim, M.; Achasov, M. N.; Ambrose, D. J.
Physical Review D, Vol. 87, Issue 1
DOI: 10.1103/PhysRevD.87.012002

Determination of the number of ψ′ events at BESIII
journal, June 2013

Ablikim, M.; Achasov, M. N.; Albayrak, O.
Chinese Physics C, Vol. 37, Issue 6
DOI: 10.1088/1674-1137/37/6/063001

The EvtGen particle decay simulation package
journal, April 2001

Lange, David J.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 462, Issue 1-2
DOI: 10.1016/S0168-9002(01)00089-4

Performance of the plugged-in ²² Na based slow positron beam facility
journal, March 2008

Ping, Wang; Yan-Yun, Ma; Xiu-Bo, Qin
Chinese Physics C, Vol. 32, Issue 3
DOI: 10.1088/1674-1137/32/3/017

Review of Particle Physics
journal, August 2014

Olive, K. A.
Chinese Physics C, Vol. 38, Issue 9
DOI: 10.1088/1674-1137/38/9/090001

Measurement of the $e^{+} e^{-} \to η J / ψ$ cross section and search for $e^{+} e^{-} \to π^{0} J / ψ$ at center-of-mass energies between 3.810 and 4.600 GeV
journal, June 2015

Ablikim, M.; Achasov, M. N.; Ai, X. C.
Physical Review D, Vol. 91, Issue 11
DOI: 10.1103/PhysRevD.91.112005

Event generator for $J / ψ$ and $ψ (2 S)$ decay
journal, June 2000

Chen, J. C.; Huang, G. S.; Qi, X. R.
Physical Review D, Vol. 62, Issue 3
DOI: 10.1103/PhysRevD.62.034003

Karl Pearson and the Chi-Squared Test
journal, April 1983

Plackett, R. L.
International Statistical Review / Revue Internationale de Statistique, Vol. 51, Issue 1
DOI: 10.2307/1402731

Two-photon widths of the $χ_{c 0, 2}$ states and helicity analysis for $χ_{c 2} \to γ γ$
journal, June 2012

Ablikim, M.; Achasov, M. N.; Ambrose, D. J.
Physical Review D, Vol. 85, Issue 11
DOI: 10.1103/PhysRevD.85.112008

The precision Monte Carlo event generator for two-fermion final states in collisions
journal, August 2000

Jadach, S.; Ward, B. F. L.; Wa̧s, Z.
Computer Physics Communications, Vol. 130, Issue 3
DOI: 10.1016/S0010-4655(00)00048-5

Higher-order multipole amplitudes in charmonium radiative transitions
journal, December 2009

Artuso, M.; Blusk, S.; Khalil, S.
Physical Review D, Vol. 80, Issue 11
DOI: 10.1103/PhysRevD.80.112003

Measurement of the integrated luminosities of the data taken by BESIII at √ s = 3.650 and 3.773 GeV
journal, December 2013

Ablikim, M.; Achasov, M. N.; Albayrak, O.
Chinese Physics C, Vol. 37, Issue 12
DOI: 10.1088/1674-1137/37/12/123001

Precision measurements of $B [ψ (3686) \to π^{+} π^{-} J / ψ]$ and $B [J / ψ \to l^{+} l^{-}]$
journal, August 2013

Ablikim, M.; Achasov, M. N.; Albayrak, O.
Physical Review D, Vol. 88, Issue 3
DOI: 10.1103/PhysRevD.88.032007

Search for $η_{c} (2 S) h_{c} \to p \bar{p}$ decays and measurements of the $χ_{c J} \to p \bar{p}$ branching fractions
journal, December 2013

Ablikim, M.; Achasov, M. N.; Ai, X. C.
Physical Review D, Vol. 88, Issue 11
DOI: 10.1103/PhysRevD.88.112001

Relativistic corrections in quarkonium
journal, September 1983

Moxhay, Peter; Rosner, Jonathan L.
Physical Review D, Vol. 28, Issue 5
DOI: 10.1103/PhysRevD.28.1132

Measurement of the $χ_{c 2}$ polarization in $ψ (2 S) \to γ χ_{c 2}$
journal, November 2004

Ablikim, M.; Bai, J. Z.; Ban, Y.
Physical Review D, Vol. 70, Issue 9
DOI: 10.1103/PhysRevD.70.092004

Charmonium: Comparison with experiment
journal, January 1980

Eichten, E.; Gottfried, K.; Kinoshita, T.
Physical Review D, Vol. 21, Issue 1
DOI: 10.1103/PhysRevD.21.203

Precision measurements of branching fractions for $ψ^{'} \to π^{0} J / ψ$ and $η J / ψ$
journal, November 2012

Ablikim, M.; Achasov, M. N.; Albayrak, O.
Physical Review D, Vol. 86, Issue 9
DOI: 10.1103/PhysRevD.86.092008

Study of the angular distribution of the reaction $\bar{p} p \to χ_{c 2} \to \frac{J}{ψ} γ \to e^{+} e^{-} γ$
journal, October 1993

Armstrong, T. A.; Bettoni, D.; Bharadwaj, V.
Physical Review D, Vol. 48, Issue 7
DOI: 10.1103/PhysRevD.48.3037

Branching fractions for transitions of $ψ (2 S)$ to $J / ψ$
journal, July 2008

Mendez, H.; Ge, J. Y.; Miller, D. H.
Physical Review D, Vol. 78, Issue 1
DOI: 10.1103/PhysRevD.78.011102

Higher-order multipole amplitude measurement in $ψ^{'} \to γ χ_{c 2}$
journal, November 2011

Ablikim, M.; Achasov, M. N.; Alberto, D.
Physical Review D, Vol. 84, Issue 9
DOI: 10.1103/PhysRevD.84.092006

Geant4—a simulation toolkit
journal, July 2003

Agostinelli, S.; Allison, J.; Amako, K.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3
DOI: 10.1016/S0168-9002(03)01368-8

Higher charmonia
journal, September 2005

Barnes, T.; Godfrey, S.; Swanson, E. S.
Physical Review D, Vol. 72, Issue 5
DOI: 10.1103/PhysRevD.72.054026

Multipole amplitudes in parity-changing one-photon transitions of charmonium
journal, May 1992

Sebastian, K. J.; Grotch, H.; Ridener, F. L.
Physical Review D, Vol. 45, Issue 9
DOI: 10.1103/PhysRevD.45.3163

Study of the angular distributions of the reactions $\bar{p} \vec{p} χ_{c 1}, χ_{c 2} \to J / ψ \vec{γ} e^{+} e^{-} γ$
journal, January 2002

Ambrogiani, M.; Bagnasco, S.; Baldini, W.
Physical Review D, Vol. 65, Issue 5
DOI: 10.1103/PhysRevD.65.052002

Exotic and excited-state radiative transitions in charmonium from lattice QCD
journal, May 2009

Dudek, Jozef J.; Edwards, Robert G.; Thomas, Christopher E.
Physical Review D, Vol. 79, Issue 9
DOI: 10.1103/PhysRevD.79.094504

Symmetries, angular distributions in $ψ^{'} \to γ χ \to γ γ ψ$ , and the interpretation of the $χ (3400 - 3550)$ levels
journal, March 1976

Karl, Gabriel; Meshkov, Sydney; Rosner, Jonathan L.
Physical Review D, Vol. 13, Issue 5
DOI: 10.1103/PhysRevD.13.1203

First Observation of the $M 1$ Transition $ψ (3686) \to γ η_{c} (2 S)$
journal, July 2012

Ablikim, M.; Achasov, M. N.; Ambrose, D. J.
Physical Review Letters, Vol. 109, Issue 4
DOI: 10.1103/PhysRevLett.109.042003

Coherent exclusive exponentiation for precision Monte Carlo calculations
journal, May 2001

Jadach, S.; Ward, B. F. L.; Wa̧s, Z.
Physical Review D, Vol. 63, Issue 11
DOI: 10.1103/PhysRevD.63.113009

Matching perturbative and parton shower corrections to Bhabha process at flavour factories
journal, December 2006

Balossini, Giovanni; Carloni Calame, Carlo M.; Montagna, Guido
Nuclear Physics B, Vol. 758, Issue 1-2
DOI: 10.1016/j.nuclphysb.2006.09.022

Evidence for the Direct Two-Photon Transition from $ψ (3686)$ to $J / ψ$
journal, October 2012

Ablikim, M.; Achasov, M. N.; Ambrose, D. J.
Physical Review Letters, Vol. 109, Issue 17
DOI: 10.1103/PhysRevLett.109.172002

Design and construction of the BESIII detector
journal, March 2010

Ablikim, M.; An, Z. H.; Bai, J. Z.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 614, Issue 3
DOI: 10.1016/j.nima.2009.12.050

Measurement of the branching ratio and polarization for $\frac{J}{ψ} \to γ f (1270)$
journal, June 1982

Edwards, C.; Partridge, R.; Peck, C.
Physical Review D, Vol. 25, Issue 11
DOI: 10.1103/PhysRevD.25.3065

Works referencing / citing this record:

Observation of OZI-suppressed decays $χ_{c J} \to ω ϕ$
journal, January 2019

Ablikim, M.; Achasov, M. N.; Ahmed, S.
Physical Review D, Vol. 99, Issue 1
DOI: 10.1103/physrevd.99.012015

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Branching fraction measurements of $ψ (3686) \to γ χ_{c J}$

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In this paper, using a sample of 106 million ψ(3686) decays, the branching fractions of ψ(3686) → γχ_c0, ψ(3686) → γχ_c1, and ψ(3686) → γχ_c2 are measured with improved precision to be (9.389±0.014±0.332) %, (9.905±0.011±0.353) %, and (9.621±0.013±0.272) %, respectively, where the first uncertainties are statistical and the second ones are systematic. Finally, the product branching fractions of ψ(3686) → γχ_c1, χ_c1 → γJ/ψ and ψ(3686) → γχ_c2, χ_c2 → γJ/ψ and the branching fractions of χ_c1 → γJ/ψ and χ_c2 → γJ/ψ are also presented.
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Title: Measurement of higher-order multipole amplitudes in ψ(3686)→γ χ c 1 , 2 with χ c 1 , 2 →γJ/ψ and search for the transition η c (2S)→γJ/ψ

Abstract

Citation Formats

M2 signatures in ψ ( 2 S ) radiative decays journal, December 2008

Study of the reaction ψ ′ → γ γ J ψ journal, May 1982

Lattice QCD study of the radiative decays J/ψ → η c γ and h c → η c γ journal, January 2013

Mesons in a relativized quark model with chromodynamics journal, July 1985

Quark Magnetic Moments and E 1 Radiative Transitions in Charmonium journal, July 1980

Spin tests for intermediate states in radiative ψ ′ ( 3684 ) decay chains journal, June 1976

Search for hadronic transition χ c J → η c π + π − and observation of χ c J → K K ¯ π π π journal, January 2013

Determination of the number of ψ′ events at BESIII journal, June 2013

The EvtGen particle decay simulation package journal, April 2001

Performance of the plugged-in 22 Na based slow positron beam facility journal, March 2008

Review of Particle Physics journal, August 2014

Measurement of the e + e − → η J / ψ cross section and search for e + e − → π 0 J / ψ at center-of-mass energies between 3.810 and 4.600 GeV journal, June 2015

Event generator for J / ψ and ψ ( 2 S ) decay journal, June 2000

Karl Pearson and the Chi-Squared Test journal, April 1983

Two-photon widths of the χ c 0 , 2 states and helicity analysis for χ c 2 → γ γ journal, June 2012

The precision Monte Carlo event generator for two-fermion final states in collisions journal, August 2000

Higher-order multipole amplitudes in charmonium radiative transitions journal, December 2009

Measurement of the integrated luminosities of the data taken by BESIII at √ s = 3.650 and 3.773 GeV journal, December 2013

Precision measurements of B [ ψ ( 3686 ) → π + π − J / ψ ] and B [ J / ψ → l + l − ] journal, August 2013

Search for η c ( 2 S ) h c → p p ¯ decays and measurements of the χ c J → p p ¯ branching fractions journal, December 2013

Relativistic corrections in quarkonium journal, September 1983

Measurement of the χ c 2 polarization in ψ ( 2 S ) → γ χ c 2 journal, November 2004

Charmonium: Comparison with experiment journal, January 1980

Precision measurements of branching fractions for ψ ′ → π 0 J / ψ and η J / ψ journal, November 2012

Study of the angular distribution of the reaction p ¯ p → χ c 2 → J ψ γ → e + e − γ journal, October 1993

Branching fractions for transitions of ψ ( 2 S ) to J / ψ journal, July 2008

Higher-order multipole amplitude measurement in ψ ′ → γ χ c 2 journal, November 2011

Geant4—a simulation toolkit journal, July 2003

Higher charmonia journal, September 2005

Multipole amplitudes in parity-changing one-photon transitions of charmonium journal, May 1992

Study of the angular distributions of the reactions p ¯ p → χ c 1 , χ c 2 → J / ψ γ → e + e − γ journal, January 2002

Exotic and excited-state radiative transitions in charmonium from lattice QCD journal, May 2009

Symmetries, angular distributions in ψ ′ → γ χ → γ γ ψ , and the interpretation of the χ ( 3 4 0 0 − 3 5 5 0 ) levels journal, March 1976

First Observation of the M 1 Transition ψ ( 3686 ) → γ η c ( 2 S ) journal, July 2012

Coherent exclusive exponentiation for precision Monte Carlo calculations journal, May 2001

Matching perturbative and parton shower corrections to Bhabha process at flavour factories journal, December 2006

Evidence for the Direct Two-Photon Transition from ψ ( 3686 ) to J / ψ journal, October 2012

Design and construction of the BESIII detector journal, March 2010

Measurement of the branching ratio and polarization for J ψ → γ f ( 1270 ) journal, June 1982

Observation of OZI-suppressed decays χ c J → ω ϕ journal, January 2019

Title: Measurement of higher-order multipole amplitudes in $ψ (3686) \to γ χ_{c 1, 2}$ with $χ_{c 1, 2} \to γ J / ψ$ and search for the transition $η_{c} (2 S) \to γ J / ψ$

M2 signatures in $ψ (2 S)$ radiative decays
journal, December 2008

Study of the reaction $ψ^{'} \to γ γ \frac{J}{ψ}$
journal, May 1982

Lattice QCD study of the radiative decays J/ψ → η c γ and h c → η c γ
journal, January 2013

Mesons in a relativized quark model with chromodynamics
journal, July 1985

Quark Magnetic Moments and $E 1$ Radiative Transitions in Charmonium
journal, July 1980

Spin tests for intermediate states in radiative $ψ^{'} (3684)$ decay chains
journal, June 1976

Search for hadronic transition $χ_{c J} \to η_{c} π^{+} π^{-}$ and observation of $χ_{c J} \to K \bar{K} π π π$
journal, January 2013

Determination of the number of ψ′ events at BESIII
journal, June 2013

The EvtGen particle decay simulation package
journal, April 2001

Performance of the plugged-in ²² Na based slow positron beam facility
journal, March 2008

Review of Particle Physics
journal, August 2014

Measurement of the $e^{+} e^{-} \to η J / ψ$ cross section and search for $e^{+} e^{-} \to π^{0} J / ψ$ at center-of-mass energies between 3.810 and 4.600 GeV
journal, June 2015

Event generator for $J / ψ$ and $ψ (2 S)$ decay
journal, June 2000

Karl Pearson and the Chi-Squared Test
journal, April 1983

Two-photon widths of the $χ_{c 0, 2}$ states and helicity analysis for $χ_{c 2} \to γ γ$
journal, June 2012

The precision Monte Carlo event generator for two-fermion final states in collisions
journal, August 2000

Higher-order multipole amplitudes in charmonium radiative transitions
journal, December 2009

Measurement of the integrated luminosities of the data taken by BESIII at √ s = 3.650 and 3.773 GeV
journal, December 2013

Precision measurements of $B [ψ (3686) \to π^{+} π^{-} J / ψ]$ and $B [J / ψ \to l^{+} l^{-}]$
journal, August 2013

Search for $η_{c} (2 S) h_{c} \to p \bar{p}$ decays and measurements of the $χ_{c J} \to p \bar{p}$ branching fractions
journal, December 2013

Relativistic corrections in quarkonium
journal, September 1983

Measurement of the $χ_{c 2}$ polarization in $ψ (2 S) \to γ χ_{c 2}$
journal, November 2004

Charmonium: Comparison with experiment
journal, January 1980

Precision measurements of branching fractions for $ψ^{'} \to π^{0} J / ψ$ and $η J / ψ$
journal, November 2012

Study of the angular distribution of the reaction $\bar{p} p \to χ_{c 2} \to \frac{J}{ψ} γ \to e^{+} e^{-} γ$
journal, October 1993

Branching fractions for transitions of $ψ (2 S)$ to $J / ψ$
journal, July 2008

Higher-order multipole amplitude measurement in $ψ^{'} \to γ χ_{c 2}$
journal, November 2011

Geant4—a simulation toolkit
journal, July 2003

Higher charmonia
journal, September 2005

Multipole amplitudes in parity-changing one-photon transitions of charmonium
journal, May 1992

Study of the angular distributions of the reactions $\bar{p} \vec{p} χ_{c 1}, χ_{c 2} \to J / ψ \vec{γ} e^{+} e^{-} γ$
journal, January 2002

Exotic and excited-state radiative transitions in charmonium from lattice QCD
journal, May 2009

Symmetries, angular distributions in $ψ^{'} \to γ χ \to γ γ ψ$ , and the interpretation of the $χ (3400 - 3550)$ levels
journal, March 1976

First Observation of the $M 1$ Transition $ψ (3686) \to γ η_{c} (2 S)$
journal, July 2012

Coherent exclusive exponentiation for precision Monte Carlo calculations
journal, May 2001

Matching perturbative and parton shower corrections to Bhabha process at flavour factories
journal, December 2006

Evidence for the Direct Two-Photon Transition from $ψ (3686)$ to $J / ψ$
journal, October 2012

Design and construction of the BESIII detector
journal, March 2010

Measurement of the branching ratio and polarization for $\frac{J}{ψ} \to γ f (1270)$
journal, June 1982

Observation of OZI-suppressed decays $χ_{c J} \to ω ϕ$
journal, January 2019