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Title: Measurements of e + e η c π + π π 0 , η c π + π , and η c π 0 γ at s from 4.18 to 4.60 GeV, and search for a Z c state close to the D D ¯ threshold decaying to η c π at s = 4.23 GeV

Abstract

We study ηc production at center-of-mass energies √s from 4.18 to 4.60 GeV in e+e annihilation data collected with the BESIII detector operating at the BEPCII storage ring, corresponding to 7.3 fb–1 of integrated luminosity. We measure the cross sections of the three different exclusive reactions e+e → ηcπ+ππ0, e+e → ηcπ+π, and e+e → ηcπ0γ. We find significant ηc production in e+e → ηcπ+ππ0 at √s of 4.23 GeV and 4.26 GeV and observe a significant energy-dependent Born cross section that we measure to be consistent with the production via the intermediate Y(4260) resonance. In addition, we perform a search for a charmoniumlike Zc state close to the $$D\bar{D}$$ threshold that decays to ηcπ, involving ground state charmonium, and observe no signal. Corresponding upper limits on the cross section of ηc and Zc production are provided, where the yields are not found to be significant.

Authors:
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Publication Date:
Research Org.:
Indiana Univ., Bloomington, IN (United States); Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
BESIII Collaboration
OSTI Identifier:
1767361
Alternate Identifier(s):
OSTI ID: 1849623
Grant/Contract Number:  
FG02-05ER41374; SC-0012069; 2015CB856700; DPT2006K-120470; SC0012069
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 103 Journal Issue: 3; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Astronomy & Astrophysics; Physics; Hadronic decays; Particle phenomena; Particle decays; Charmed mesons; Hadrons; Mesons; Heavy mesons; Exotic mesons

Citation Formats

Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., Amoroso, A., An, Q., Anita,, Bai, X. H., Bai, Y., Bakina, O., Baldini Ferroli, R., Balossino, I., Ban, Y., Begzsuren, K., Bennett, J. V., Berger, N., Bertani, M., Bettoni, D., Bianchi, F., Biernat, J., Bloms, J., Bortone, A., Boyko, I., Briere, R. A., Cai, H., Cai, X., Calcaterra, A., Cao, G. F., Cao, N., Cetin, S. A., Chang, J. F., Chang, W. L., Chelkov, G., Chen, D. Y., Chen, G., Chen, H. S., Chen, M. L., Chen, S. J., Chen, X. R., Chen, Y. B., Chen, Z. J., Cheng, W. S., Cibinetto, G., Cossio, F., Cui, X. F., Dai, H. L., Dai, J. P., Dai, X. C., Dbeyssi, A., de Boer, R. B., 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., Du, S. X., Fang, J., Fang, S. S., Fang, Y., Farinelli, R., Fava, L., Feldbauer, F., Felici, G., Feng, C. Q., Fritsch, M., Fu, C. D., Fu, Y., Gao, X. L., Gao, Y., Gao, Y., Gao, Y. G., Garzia, I., Gersabeck, E. M., Gilman, A., Goetzen, K., Gong, L., Gong, W. X., Gradl, W., Greco, M., Gu, L. M., Gu, M. H., Gu, S., Gu, Y. T., Guan, C. Y., Guo, A. Q., Guo, L. B., Guo, R. P., Guo, Y. P., Guo, Y. P., Guskov, A., Han, S., Han, T. T., Han, T. Z., Hao, X. Q., Harris, F. A., He, K. L., Heinsius, F. H., Heinz, C. H., Held, T., Heng, Y. K., Himmelreich, M., Holtmann, T., Hou, Y. R., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Hu, Y., Huang, G. S., Huang, L. Q., Huang, X. T., Huang, Y. P., Huang, Z., Huesken, N., Hussain, T., Ikegami Andersson, W., Imoehl, W., Irshad, M., Jaeger, S., Janchiv, S., Ji, Q., Ji, Q. P., Ji, X. B., Ji, X. L., Jiang, H. B., Jiang, X. S., Jiang, X. Y., Jiao, J. B., Jiao, Z., Jin, S., Jin, Y., Johansson, T., Kalantar-Nayestanaki, N., Kang, X. S., Kappert, R., Kavatsyuk, M., Ke, B. C., Keshk, I. K., Khoukaz, A., Kiese, P., Kiuchi, R., Kliemt, R., Koch, L., Kolcu, O. B., Kopf, B., Kuemmel, M., Kuessner, M., Kupsc, A., Kurth, M. G., Kühn, W., Lane, J. J., Lange, J. S., Larin, P., Lavezzi, L., Leithoff, H., Lellmann, M., Lenz, T., Li, C., Li, C. H., Li, Cheng, Li, D. M., Li, F., Li, G., Li, H., Li, H. B., Li, H. J., Li, J. L., Li, J. Q., Li, Ke, Li, L. K., Li, Lei, Li, P. L., Li, P. R., Li, S. Y., Li, W. D., Li, W. G., Li, X. H., Li, X. L., Li, Z. B., Li, Z. Y., Liang, H., Liang, H., Liang, Y. F., Liang, Y. T., Liao, L. Z., Libby, J., Lin, C. X., Liu, B., Liu, B. J., Liu, C. X., Liu, D., Liu, D. Y., Liu, F. H., Liu, Fang, Liu, Feng, Liu, H. B., Liu, H. M., Liu, Huanhuan, Liu, Huihui, Liu, J. B., Liu, J. Y., Liu, K., Liu, K. Y., Liu, Ke, Liu, L., Liu, Q., Liu, S. B., Liu, Shuai, Liu, T., Liu, X., Liu, Y. B., Liu, Z. A., Liu, Z. Q., Long, Y. F., Lou, X. C., Lu, F. X., Lu, H. J., Lu, J. D., Lu, J. G., Lu, X. L., Lu, Y., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, P. W., Luo, T., Luo, X. L., Lusso, S., Lyu, X. R., Ma, F. C., Ma, H. L., Ma, L. L., Ma, M. M., Ma, Q. M., Ma, R. Q., Ma, R. T., Ma, X. N., Ma, X. X., Ma, X. Y., Ma, Y. M., Maas, F. E., Maggiora, M., Maldaner, S., Malde, S., Malik, Q. A., Mangoni, A., Mao, Y. J., Mao, Z. P., Marcello, S., Meng, Z. X., Messchendorp, J. G., Mezzadri, G., Min, T. J., Mitchell, R. E., Mo, X. H., Mo, Y. J., Muchnoi, N. Yu., Muramatsu, H., Nakhoul, S., Nefedov, Y., Nerling, F., Nikolaev, I. B., Ning, Z., Nisar, S., Olsen, S. L., Ouyang, Q., Pacetti, S., Pan, X., Pan, Y., Pathak, A., Patteri, P., Pelizaeus, M., Peng, H. P., Peters, K., Pettersson, J., Ping, J. L., Ping, R. G., Pitka, A., Poling, R., Prasad, V., Qi, H., Qi, H. R., Qi, M., Qi, T. Y., Qi, T. Y., Qian, S., Qian, W. -B., Qian, Z., Qiao, C. F., Qin, L. Q., Qin, X. S., Qin, Z. H., Qiu, J. F., Qu, S. Q., Rashid, K. H., Ravindran, K., Redmer, C. F., Rivetti, A., Rodin, V., Rolo, M., Rong, G., Rosner, Ch., Rump, M., Sarantsev, A., Schelhaas, Y., Schnier, C., Schoenning, K., Scodeggio, M., Shan, D. C., Shan, W., Shan, X. Y., Shao, M., Shen, C. P., Shen, P. X., Shen, X. Y., Shi, H. C., Shi, R. S., Shi, X., Shi, X. D., Song, J. J., Song, Q. Q., Song, W. M., Song, Y. X., Sosio, S., Spataro, S., Sui, F. F., Sun, G. X., Sun, J. F., Sun, L., Sun, S. S., Sun, T., Sun, W. Y., Sun, X., Sun, Y. J., Sun, Y. K., Sun, Y. Z., Sun, Z. T., Tan, Y. H., Tan, Y. X., Tang, C. J., Tang, G. Y., Tang, J., Thoren, V., Uman, I., Wang, B., Wang, B. L., Wang, C. W., Wang, D. Y., Wang, H. P., Wang, K., Wang, L. L., Wang, M., Wang, M. Z., Wang, Meng, Wang, W. H., Wang, W. P., Wang, X., Wang, X. F., Wang, X. L., Wang, Y., Wang, Y., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. Y., Wang, Ziyi, Wang, Zongyuan, Wei, D. H., Weidenkaff, P., Weidner, F., Wen, S. P., White, D. J., Wiedner, U., Wilkinson, G., Wolke, M., Wollenberg, L., Wu, J. F., Wu, L. H., Wu, L. J., Wu, X., Wu, Z., Xia, L., Xiao, H., Xiao, S. Y., Xiao, Y. J., Xiao, Z. J., Xie, X. H., Xie, Y. G., Xie, Y. H., Xing, T. Y., Xiong, X. A., Xu, G. F., Xu, J. J., Xu, Q. J., Xu, W., Xu, X. P., Yan, F., Yan, L., Yan, L., Yan, W. B., Yan, W. C., Yan, Xu, Yang, H. J., Yang, H. X., Yang, L., Yang, R. X., Yang, S. L., Yang, Y. H., Yang, Y. X., Yang, Yifan, Yang, Zhi, Ye, M., Ye, M. H., Yin, J. H., You, Z. Y., Yu, B. X., Yu, C. X., Yu, G., Yu, J. S., Yu, T., Yuan, C. Z., Yuan, W., Yuan, X. Q., Yuan, Y., Yuan, Z. Y., Yue, C. X., Yuncu, A., Zafar, A. A., Zeng, Y., Zhang, B. X., Zhang, Guangyi, Zhang, H. H., Zhang, H. Y., Zhang, J. L., Zhang, J. Q., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., Zhang, Jianyu, Zhang, Jiawei, Zhang, L., Zhang, Lei, Zhang, S., Zhang, S. F., Zhang, T. J., Zhang, X. Y., Zhang, Y., Zhang, Y. H., Zhang, Y. T., Zhang, Yan, Zhang, Yao, Zhang, Yi, Zhang, Z. H., Zhang, Z. Y., Zhao, G., Zhao, J., Zhao, J. Y., Zhao, J. Z., Zhao, Lei, Zhao, Ling, Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, Y. B., Zhao, Y. X., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y., Zheng, Y. H., Zhong, B., Zhong, C., Zhou, L. P., Zhou, Q., Zhou, X., Zhou, X. K., Zhou, X. R., Zhu, A. N., Zhu, J., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, W. J., Zhu, X. L., Zhu, Y. C., Zhu, Z. A., Zou, B. S., Zou, J. H., and BESIII Collaboration. Measurements of e + e − → η c π + π − π 0 , η c π + π − , and η c π 0 γ at s from 4.18 to 4.60 GeV, and search for a Z c state close to the D D ¯ threshold decaying to η c π at s = 4.23     GeV. United States: N. p., 2021. Web. doi:10.1103/PhysRevD.103.032006.
Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., Amoroso, A., An, Q., Anita,, Bai, X. H., Bai, Y., Bakina, O., Baldini Ferroli, R., Balossino, I., Ban, Y., Begzsuren, K., Bennett, J. V., Berger, N., Bertani, M., Bettoni, D., Bianchi, F., Biernat, J., Bloms, J., Bortone, A., Boyko, I., Briere, R. A., Cai, H., Cai, X., Calcaterra, A., Cao, G. F., Cao, N., Cetin, S. A., Chang, J. F., Chang, W. L., Chelkov, G., Chen, D. Y., Chen, G., Chen, H. S., Chen, M. L., Chen, S. J., Chen, X. R., Chen, Y. B., Chen, Z. J., Cheng, W. S., Cibinetto, G., Cossio, F., Cui, X. F., Dai, H. L., Dai, J. P., Dai, X. C., Dbeyssi, A., de Boer, R. B., 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., Du, S. X., Fang, J., Fang, S. S., Fang, Y., Farinelli, R., Fava, L., Feldbauer, F., Felici, G., Feng, C. Q., Fritsch, M., Fu, C. D., Fu, Y., Gao, X. L., Gao, Y., Gao, Y., Gao, Y. G., Garzia, I., Gersabeck, E. M., Gilman, A., Goetzen, K., Gong, L., Gong, W. X., Gradl, W., Greco, M., Gu, L. M., Gu, M. H., Gu, S., Gu, Y. T., Guan, C. Y., Guo, A. Q., Guo, L. B., Guo, R. P., Guo, Y. P., Guo, Y. P., Guskov, A., Han, S., Han, T. T., Han, T. Z., Hao, X. Q., Harris, F. A., He, K. L., Heinsius, F. H., Heinz, C. H., Held, T., Heng, Y. K., Himmelreich, M., Holtmann, T., Hou, Y. R., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Hu, Y., Huang, G. S., Huang, L. Q., Huang, X. T., Huang, Y. P., Huang, Z., Huesken, N., Hussain, T., Ikegami Andersson, W., Imoehl, W., Irshad, M., Jaeger, S., Janchiv, S., Ji, Q., Ji, Q. P., Ji, X. B., Ji, X. L., Jiang, H. B., Jiang, X. S., Jiang, X. Y., Jiao, J. B., Jiao, Z., Jin, S., Jin, Y., Johansson, T., Kalantar-Nayestanaki, N., Kang, X. S., Kappert, R., Kavatsyuk, M., Ke, B. C., Keshk, I. K., Khoukaz, A., Kiese, P., Kiuchi, R., Kliemt, R., Koch, L., Kolcu, O. B., Kopf, B., Kuemmel, M., Kuessner, M., Kupsc, A., Kurth, M. G., Kühn, W., Lane, J. J., Lange, J. S., Larin, P., Lavezzi, L., Leithoff, H., Lellmann, M., Lenz, T., Li, C., Li, C. H., Li, Cheng, Li, D. M., Li, F., Li, G., Li, H., Li, H. B., Li, H. J., Li, J. L., Li, J. Q., Li, Ke, Li, L. K., Li, Lei, Li, P. L., Li, P. R., Li, S. Y., Li, W. D., Li, W. G., Li, X. H., Li, X. L., Li, Z. B., Li, Z. Y., Liang, H., Liang, H., Liang, Y. F., Liang, Y. T., Liao, L. Z., Libby, J., Lin, C. X., Liu, B., Liu, B. J., Liu, C. X., Liu, D., Liu, D. Y., Liu, F. H., Liu, Fang, Liu, Feng, Liu, H. B., Liu, H. M., Liu, Huanhuan, Liu, Huihui, Liu, J. B., Liu, J. Y., Liu, K., Liu, K. Y., Liu, Ke, Liu, L., Liu, Q., Liu, S. B., Liu, Shuai, Liu, T., Liu, X., Liu, Y. B., Liu, Z. A., Liu, Z. Q., Long, Y. F., Lou, X. C., Lu, F. X., Lu, H. J., Lu, J. D., Lu, J. G., Lu, X. L., Lu, Y., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, P. W., Luo, T., Luo, X. L., Lusso, S., Lyu, X. R., Ma, F. C., Ma, H. L., Ma, L. L., Ma, M. M., Ma, Q. M., Ma, R. Q., Ma, R. T., Ma, X. N., Ma, X. X., Ma, X. Y., Ma, Y. M., Maas, F. E., Maggiora, M., Maldaner, S., Malde, S., Malik, Q. A., Mangoni, A., Mao, Y. J., Mao, Z. P., Marcello, S., Meng, Z. X., Messchendorp, J. G., Mezzadri, G., Min, T. J., Mitchell, R. E., Mo, X. H., Mo, Y. J., Muchnoi, N. Yu., Muramatsu, H., Nakhoul, S., Nefedov, Y., Nerling, F., Nikolaev, I. B., Ning, Z., Nisar, S., Olsen, S. L., Ouyang, Q., Pacetti, S., Pan, X., Pan, Y., Pathak, A., Patteri, P., Pelizaeus, M., Peng, H. P., Peters, K., Pettersson, J., Ping, J. L., Ping, R. G., Pitka, A., Poling, R., Prasad, V., Qi, H., Qi, H. R., Qi, M., Qi, T. Y., Qi, T. Y., Qian, S., Qian, W. -B., Qian, Z., Qiao, C. F., Qin, L. Q., Qin, X. S., Qin, Z. H., Qiu, J. F., Qu, S. Q., Rashid, K. H., Ravindran, K., Redmer, C. F., Rivetti, A., Rodin, V., Rolo, M., Rong, G., Rosner, Ch., Rump, M., Sarantsev, A., Schelhaas, Y., Schnier, C., Schoenning, K., Scodeggio, M., Shan, D. C., Shan, W., Shan, X. Y., Shao, M., Shen, C. P., Shen, P. X., Shen, X. Y., Shi, H. C., Shi, R. S., Shi, X., Shi, X. D., Song, J. J., Song, Q. Q., Song, W. M., Song, Y. X., Sosio, S., Spataro, S., Sui, F. F., Sun, G. X., Sun, J. F., Sun, L., Sun, S. S., Sun, T., Sun, W. Y., Sun, X., Sun, Y. J., Sun, Y. K., Sun, Y. Z., Sun, Z. T., Tan, Y. H., Tan, Y. X., Tang, C. J., Tang, G. Y., Tang, J., Thoren, V., Uman, I., Wang, B., Wang, B. L., Wang, C. W., Wang, D. Y., Wang, H. P., Wang, K., Wang, L. L., Wang, M., Wang, M. Z., Wang, Meng, Wang, W. H., Wang, W. P., Wang, X., Wang, X. F., Wang, X. L., Wang, Y., Wang, Y., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. Y., Wang, Ziyi, Wang, Zongyuan, Wei, D. H., Weidenkaff, P., Weidner, F., Wen, S. P., White, D. J., Wiedner, U., Wilkinson, G., Wolke, M., Wollenberg, L., Wu, J. F., Wu, L. H., Wu, L. J., Wu, X., Wu, Z., Xia, L., Xiao, H., Xiao, S. Y., Xiao, Y. J., Xiao, Z. J., Xie, X. H., Xie, Y. G., Xie, Y. H., Xing, T. Y., Xiong, X. A., Xu, G. F., Xu, J. J., Xu, Q. J., Xu, W., Xu, X. P., Yan, F., Yan, L., Yan, L., Yan, W. B., Yan, W. C., Yan, Xu, Yang, H. J., Yang, H. X., Yang, L., Yang, R. X., Yang, S. L., Yang, Y. H., Yang, Y. X., Yang, Yifan, Yang, Zhi, Ye, M., Ye, M. H., Yin, J. H., You, Z. Y., Yu, B. X., Yu, C. X., Yu, G., Yu, J. S., Yu, T., Yuan, C. Z., Yuan, W., Yuan, X. Q., Yuan, Y., Yuan, Z. Y., Yue, C. X., Yuncu, A., Zafar, A. A., Zeng, Y., Zhang, B. X., Zhang, Guangyi, Zhang, H. H., Zhang, H. Y., Zhang, J. L., Zhang, J. Q., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., Zhang, Jianyu, Zhang, Jiawei, Zhang, L., Zhang, Lei, Zhang, S., Zhang, S. F., Zhang, T. J., Zhang, X. Y., Zhang, Y., Zhang, Y. H., Zhang, Y. T., Zhang, Yan, Zhang, Yao, Zhang, Yi, Zhang, Z. H., Zhang, Z. Y., Zhao, G., Zhao, J., Zhao, J. Y., Zhao, J. Z., Zhao, Lei, Zhao, Ling, Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, Y. B., Zhao, Y. X., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y., Zheng, Y. H., Zhong, B., Zhong, C., Zhou, L. P., Zhou, Q., Zhou, X., Zhou, X. K., Zhou, X. R., Zhu, A. N., Zhu, J., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, W. J., Zhu, X. L., Zhu, Y. C., Zhu, Z. A., Zou, B. S., Zou, J. H., & BESIII Collaboration. Measurements of e + e − → η c π + π − π 0 , η c π + π − , and η c π 0 γ at s from 4.18 to 4.60 GeV, and search for a Z c state close to the D D ¯ threshold decaying to η c π at s = 4.23     GeV. United States. https://doi.org/10.1103/PhysRevD.103.032006
Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., Amoroso, A., An, Q., Anita,, Bai, X. H., Bai, Y., Bakina, O., Baldini Ferroli, R., Balossino, I., Ban, Y., Begzsuren, K., Bennett, J. V., Berger, N., Bertani, M., Bettoni, D., Bianchi, F., Biernat, J., Bloms, J., Bortone, A., Boyko, I., Briere, R. A., Cai, H., Cai, X., Calcaterra, A., Cao, G. F., Cao, N., Cetin, S. A., Chang, J. F., Chang, W. L., Chelkov, G., Chen, D. Y., Chen, G., Chen, H. S., Chen, M. L., Chen, S. J., Chen, X. R., Chen, Y. B., Chen, Z. J., Cheng, W. S., Cibinetto, G., Cossio, F., Cui, X. F., Dai, H. L., Dai, J. P., Dai, X. C., Dbeyssi, A., de Boer, R. B., 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., Du, S. X., Fang, J., Fang, S. S., Fang, Y., Farinelli, R., Fava, L., Feldbauer, F., Felici, G., Feng, C. Q., Fritsch, M., Fu, C. D., Fu, Y., Gao, X. L., Gao, Y., Gao, Y., Gao, Y. G., Garzia, I., Gersabeck, E. M., Gilman, A., Goetzen, K., Gong, L., Gong, W. X., Gradl, W., Greco, M., Gu, L. M., Gu, M. H., Gu, S., Gu, Y. T., Guan, C. Y., Guo, A. Q., Guo, L. B., Guo, R. P., Guo, Y. P., Guo, Y. P., Guskov, A., Han, S., Han, T. T., Han, T. Z., Hao, X. Q., Harris, F. A., He, K. L., Heinsius, F. H., Heinz, C. H., Held, T., Heng, Y. K., Himmelreich, M., Holtmann, T., Hou, Y. R., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Hu, Y., Huang, G. S., Huang, L. Q., Huang, X. T., Huang, Y. P., Huang, Z., Huesken, N., Hussain, T., Ikegami Andersson, W., Imoehl, W., Irshad, M., Jaeger, S., Janchiv, S., Ji, Q., Ji, Q. P., Ji, X. B., Ji, X. L., Jiang, H. B., Jiang, X. S., Jiang, X. Y., Jiao, J. B., Jiao, Z., Jin, S., Jin, Y., Johansson, T., Kalantar-Nayestanaki, N., Kang, X. S., Kappert, R., Kavatsyuk, M., Ke, B. C., Keshk, I. K., Khoukaz, A., Kiese, P., Kiuchi, R., Kliemt, R., Koch, L., Kolcu, O. B., Kopf, B., Kuemmel, M., Kuessner, M., Kupsc, A., Kurth, M. G., Kühn, W., Lane, J. 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H., Zhu, W. J., Zhu, X. L., Zhu, Y. C., Zhu, Z. A., Zou, B. S., Zou, J. H., and BESIII Collaboration. Thu . "Measurements of e + e − → η c π + π − π 0 , η c π + π − , and η c π 0 γ at s from 4.18 to 4.60 GeV, and search for a Z c state close to the D D ¯ threshold decaying to η c π at s = 4.23     GeV". United States. https://doi.org/10.1103/PhysRevD.103.032006.
@article{osti_1767361,
title = {Measurements of e + e − → η c π + π − π 0 , η c π + π − , and η c π 0 γ at s from 4.18 to 4.60 GeV, and search for a Z c state close to the D D ¯ threshold decaying to η c π at s = 4.23     GeV},
author = {Ablikim, M. and Achasov, M. N. and Adlarson, P. and Ahmed, S. and Albrecht, M. and Aliberti, R. and Amoroso, A. and An, Q. and Anita, and Bai, X. H. and Bai, Y. and Bakina, O. and Baldini Ferroli, R. and Balossino, I. and Ban, Y. and Begzsuren, K. and Bennett, J. V. and Berger, N. and Bertani, M. and Bettoni, D. and Bianchi, F. and Biernat, J. and Bloms, J. and Bortone, A. and Boyko, I. and Briere, R. A. and Cai, H. and Cai, X. and Calcaterra, A. and Cao, G. F. and Cao, N. and Cetin, S. A. and Chang, J. F. and Chang, W. L. and Chelkov, G. and Chen, D. Y. and Chen, G. and Chen, H. S. and Chen, M. L. and Chen, S. J. and Chen, X. R. and Chen, Y. B. and Chen, Z. J. and Cheng, W. S. and Cibinetto, G. and Cossio, F. and Cui, X. F. and Dai, H. L. and Dai, J. P. and Dai, X. C. and Dbeyssi, A. and de Boer, R. B. 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 Du, S. X. and Fang, J. and Fang, S. S. and Fang, Y. and Farinelli, R. and Fava, L. and Feldbauer, F. and Felici, G. and Feng, C. Q. and Fritsch, M. and Fu, C. D. and Fu, Y. and Gao, X. L. and Gao, Y. and Gao, Y. and Gao, Y. G. and Garzia, I. and Gersabeck, E. M. and Gilman, A. and Goetzen, K. and Gong, L. and Gong, W. X. and Gradl, W. and Greco, M. and Gu, L. M. and Gu, M. H. and Gu, S. and Gu, Y. T. and Guan, C. Y. and Guo, A. Q. and Guo, L. B. and Guo, R. P. and Guo, Y. P. and Guo, Y. P. and Guskov, A. and Han, S. and Han, T. T. and Han, T. Z. and Hao, X. Q. and Harris, F. A. and He, K. L. and Heinsius, F. H. and Heinz, C. H. and Held, T. and Heng, Y. K. and Himmelreich, M. and Holtmann, T. and Hou, Y. R. and Hou, Z. L. and Hu, H. M. and Hu, J. F. and Hu, T. and Hu, Y. and Huang, G. S. and Huang, L. Q. and Huang, X. T. and Huang, Y. P. and Huang, Z. and Huesken, N. and Hussain, T. and Ikegami Andersson, W. and Imoehl, W. and Irshad, M. and Jaeger, S. and Janchiv, S. and Ji, Q. and Ji, Q. P. and Ji, X. B. and Ji, X. L. and Jiang, H. B. and Jiang, X. S. and Jiang, X. Y. and Jiao, J. B. and Jiao, Z. and Jin, S. and Jin, Y. and Johansson, T. and Kalantar-Nayestanaki, N. and Kang, X. S. and Kappert, R. and Kavatsyuk, M. and Ke, B. C. and Keshk, I. K. and Khoukaz, A. and Kiese, P. and Kiuchi, R. and Kliemt, R. and Koch, L. and Kolcu, O. B. and Kopf, B. and Kuemmel, M. and Kuessner, M. and Kupsc, A. and Kurth, M. G. and Kühn, W. and Lane, J. J. and Lange, J. S. and Larin, P. and Lavezzi, L. and Leithoff, H. and Lellmann, M. and Lenz, T. and Li, C. and Li, C. H. and Li, Cheng and Li, D. M. and Li, F. and Li, G. and Li, H. and Li, H. B. and Li, H. J. and Li, J. L. and Li, J. Q. and Li, Ke and Li, L. K. and Li, Lei and Li, P. L. and Li, P. R. and Li, S. Y. and Li, W. D. and Li, W. G. and Li, X. H. and Li, X. L. and Li, Z. B. and Li, Z. Y. and Liang, H. and Liang, H. and Liang, Y. F. and Liang, Y. T. and Liao, L. Z. and Libby, J. and Lin, C. X. and Liu, B. and Liu, B. J. and Liu, C. X. and Liu, D. and Liu, D. Y. and Liu, F. H. and Liu, Fang and Liu, Feng and Liu, H. B. and Liu, H. M. and Liu, Huanhuan and Liu, Huihui and Liu, J. B. and Liu, J. Y. and Liu, K. and Liu, K. Y. and Liu, Ke and Liu, L. and Liu, Q. and Liu, S. B. and Liu, Shuai and Liu, T. and Liu, X. and Liu, Y. B. and Liu, Z. A. and Liu, Z. Q. and Long, Y. F. and Lou, X. C. and Lu, F. X. and Lu, H. J. and Lu, J. D. and Lu, J. G. and Lu, X. L. and Lu, Y. and Lu, Y. P. and Luo, C. L. and Luo, M. X. and Luo, P. W. and Luo, T. and Luo, X. L. and Lusso, S. 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, R. Q. and Ma, R. T. and Ma, X. N. and Ma, X. X. and Ma, X. Y. and Ma, Y. M. and Maas, F. E. and Maggiora, M. and Maldaner, S. and Malde, S. and Malik, Q. A. and Mangoni, A. and Mao, Y. J. and Mao, Z. P. and Marcello, S. and Meng, Z. X. and Messchendorp, J. G. and Mezzadri, G. and Min, T. J. and Mitchell, R. E. and Mo, X. H. and Mo, Y. J. and Muchnoi, N. Yu. and Muramatsu, H. and Nakhoul, S. and Nefedov, Y. and Nerling, F. and Nikolaev, I. B. and Ning, Z. and Nisar, S. and Olsen, S. L. and Ouyang, Q. and Pacetti, S. and Pan, X. and Pan, Y. and Pathak, A. 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 Pitka, A. and Poling, R. and Prasad, V. and Qi, H. and Qi, H. R. and Qi, M. and Qi, T. Y. and Qi, T. Y. and Qian, S. and Qian, W. -B. and Qian, Z. and Qiao, C. F. and Qin, L. Q. and Qin, X. S. and Qin, Z. H. and Qiu, J. F. and Qu, S. Q. and Rashid, K. H. and Ravindran, K. and Redmer, C. F. and Rivetti, A. and Rodin, V. and Rolo, M. and Rong, G. and Rosner, Ch. and Rump, M. and Sarantsev, A. and Schelhaas, Y. and Schnier, C. and Schoenning, K. and Scodeggio, M. and Shan, D. C. and Shan, W. and Shan, X. Y. and Shao, M. and Shen, C. P. and Shen, P. X. and Shen, X. Y. and Shi, H. C. and Shi, R. S. and Shi, X. and Shi, X. D. and Song, J. J. and Song, Q. Q. and Song, W. M. and Song, Y. X. and Sosio, S. and Spataro, S. and Sui, F. F. and Sun, G. X. and Sun, J. F. and Sun, L. and Sun, S. S. and Sun, T. and Sun, W. Y. and Sun, X. and Sun, Y. J. and Sun, Y. K. and Sun, Y. Z. and Sun, Z. T. and Tan, Y. H. and Tan, Y. X. and Tang, C. J. and Tang, G. Y. and Tang, J. and Thoren, V. and Uman, I. and Wang, B. and Wang, B. L. and Wang, C. W. and Wang, D. Y. and Wang, H. P. and Wang, K. and Wang, L. L. and Wang, M. and Wang, M. Z. and Wang, Meng and Wang, W. H. and Wang, W. P. and Wang, X. and Wang, X. F. and Wang, X. L. and Wang, Y. and Wang, Y. and Wang, Y. D. and Wang, Y. F. and Wang, Y. Q. and Wang, Z. and Wang, Z. Y. and Wang, Ziyi and Wang, Zongyuan and Wei, D. H. and Weidenkaff, P. and Weidner, F. and Wen, S. P. and White, D. J. and Wiedner, U. and Wilkinson, G. and Wolke, M. and Wollenberg, L. and Wu, J. F. and Wu, L. H. and Wu, L. J. and Wu, X. and Wu, Z. and Xia, L. and Xiao, H. and Xiao, S. Y. and Xiao, Y. J. and Xiao, Z. J. and Xie, X. H. and Xie, Y. G. and Xie, Y. H. and Xing, T. Y. and Xiong, X. A. and Xu, G. F. and Xu, J. J. and Xu, Q. J. and Xu, W. and Xu, X. P. and Yan, F. and Yan, L. and Yan, L. and Yan, W. B. and Yan, W. C. and Yan, Xu and Yang, H. J. and Yang, H. X. and Yang, L. and Yang, R. X. and Yang, S. L. and Yang, Y. H. and Yang, Y. X. and Yang, Yifan and Yang, Zhi and Ye, M. and Ye, M. H. and Yin, J. H. and You, Z. Y. and Yu, B. X. and Yu, C. X. and Yu, G. and Yu, J. S. and Yu, T. and Yuan, C. Z. and Yuan, W. and Yuan, X. Q. and Yuan, Y. and Yuan, Z. Y. and Yue, C. X. and Yuncu, A. and Zafar, A. A. and Zeng, Y. and Zhang, B. X. and Zhang, Guangyi and Zhang, H. H. and Zhang, H. Y. and Zhang, J. L. and Zhang, J. Q. and Zhang, J. W. and Zhang, J. Y. and Zhang, J. Z. and Zhang, Jianyu and Zhang, Jiawei and Zhang, L. and Zhang, Lei and Zhang, S. and Zhang, S. F. and Zhang, T. J. and Zhang, X. Y. and Zhang, Y. and Zhang, Y. H. and Zhang, Y. T. and Zhang, Yan and Zhang, Yao and Zhang, Yi and Zhang, Z. H. and Zhang, Z. Y. and Zhao, G. and Zhao, J. and Zhao, J. Y. and Zhao, J. Z. and Zhao, Lei and Zhao, Ling and Zhao, M. G. and Zhao, Q. and Zhao, S. J. and Zhao, Y. B. and Zhao, Y. X. and Zhao, Z. G. and Zhemchugov, A. and Zheng, B. and Zheng, J. P. and Zheng, Y. and Zheng, Y. H. and Zhong, B. and Zhong, C. and Zhou, L. P. and Zhou, Q. and Zhou, X. and Zhou, X. K. and Zhou, X. R. and Zhu, A. N. and Zhu, J. and Zhu, K. and Zhu, K. J. and Zhu, S. H. and Zhu, W. J. and Zhu, X. L. and Zhu, Y. C. and Zhu, Z. A. and Zou, B. S. and Zou, J. H. and BESIII Collaboration},
abstractNote = {We study ηc production at center-of-mass energies √s from 4.18 to 4.60 GeV in e+e– annihilation data collected with the BESIII detector operating at the BEPCII storage ring, corresponding to 7.3 fb–1 of integrated luminosity. We measure the cross sections of the three different exclusive reactions e+e– → ηcπ+π–π0, e+e– → ηcπ+π–, and e+e– → ηcπ0γ. We find significant ηc production in e+e– → ηcπ+π–π0 at √s of 4.23 GeV and 4.26 GeV and observe a significant energy-dependent Born cross section that we measure to be consistent with the production via the intermediate Y(4260) resonance. In addition, we perform a search for a charmoniumlike Zc state close to the $D\bar{D}$ threshold that decays to ηcπ, involving ground state charmonium, and observe no signal. Corresponding upper limits on the cross section of ηc and Zc production are provided, where the yields are not found to be significant.},
doi = {10.1103/PhysRevD.103.032006},
journal = {Physical Review D},
number = 3,
volume = 103,
place = {United States},
year = {Thu Feb 25 00:00:00 EST 2021},
month = {Thu Feb 25 00:00:00 EST 2021}
}

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How the Z c ( 3900 ) Reveals the Spectra of Charmonium Hybrids and Tetraquarks
journal, October 2013


Observation of the charged hadron <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msubsup><mml:mrow><mml:mi>Z</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msubsup><mml:mo stretchy="false">(</mml:mo><mml:mn>3900</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> and evidence for the neutral <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msubsup><mml:mrow><mml:mi>Z</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msubsup><mml:mo stretchy="false">(</mml:mo><mml:mn>3900</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> in <mml:math altimg="si3.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup><mml:mo>→</mml:mo><mml:mi>π</mml:mi><mml:mi>π</mml:mi><mml:mi>J</mml:mi><mml:mo stretchy="false">/</mml:mo><mml:mi>ψ</mml:mi></mml:math> at <mml:math altimg="si4.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>4170</mml:mn><mml:mspace width="0.25em"/><mml:mtext>MeV</mml:mtext></mml:math>
journal, December 2013


Observation of e + e π 0 π 0 h c and a Neutral Charmoniumlike Structure Z c ( 4020 ) 0
journal, November 2014


Observation of a Charged Charmoniumlike Structure in e + e π + π J / ψ at s = 4.26 GeV
journal, June 2013


Study of e + e π + π J / ψ and Observation of a Charged Charmoniumlike State at Belle
journal, June 2013


Hadronic molecules
journal, February 2018


Observation of a Charged ( D D ¯ * ) ± Mass Peak in e + e π D D ¯ * at s = 4.26 GeV
journal, January 2014


Nonstandard heavy mesons and baryons: Experimental evidence
journal, February 2018


Diquark-antidiquark states with hidden or open charm and the nature of X ( 3872 )
journal, January 2005


Precise Measurement of the e + e π + π J / ψ Cross Section at Center-of-Mass Energies from 3.77 to 4.60 GeV
journal, March 2017


Observation of a Resonancelike Structure in the π + ψ Mass Distribution in Exclusive B K π + ψ Decays
journal, April 2008


Observation of a Neutral Charmoniumlike State Z c ( 4025 ) 0 in e + e ( D * D ¯ * ) 0 π 0
journal, October 2015


Spectroscopy at B-Factories Using hard Photon Emission
journal, December 1999

  • Benayoun, M.; Eidelman, S. I.; Ivanchenko, V. N.
  • Modern Physics Letters A, Vol. 14, Issue 37
  • DOI: 10.1142/S021773239900273X

Observation of e + e η h c at center-of-mass energies from 4.085 to 4.600 GeV
journal, July 2017


Observation of a Broad Structure in the π + π J / ψ Mass Spectrum around 4.26 GeV / c 2
journal, September 2005


Observation of Two Resonant Structures in e + e π + π ψ ( 2 S ) via Initial-State Radiation at Belle
journal, October 2007


Study of the process e + e π 0 π 0 J / ψ and neutral charmoniumlike state Z c ( 3900 ) 0
journal, July 2020


Trial factors for the look elsewhere effect in high energy physics
journal, October 2010


Determination of the Spin and Parity of the Z c ( 3900 )
journal, August 2017


Observation of Z c ( 3900 ) 0 in e + e π 0 π 0 J / ψ
journal, September 2015


Development of dipole magnet power supply for BEPC-II energy upgrading project
journal, January 2019


Evidence for an $$\eta _c(1S) \pi ^-$$ η c ( 1 S ) π - resonance in $$B^0 \rightarrow \eta _c(1S) K^+\pi ^-$$ B 0 → η c ( 1 S ) K + π - decays
journal, December 2018


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

Multiquark resonances
journal, January 2017


Charm Physics
journal, May 2009

  • Asner, D. M.; Bigi, I. I.; Charles, J.
  • International Journal of Modern Physics A, Vol. 24, Issue supp01
  • DOI: 10.1142/S0217751X09046801

The hidden-charm pentaquark and tetraquark states
journal, June 2016


QED bremsstrahlung in semileptonic B and leptonic τ decays
journal, April 1993


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

Measurements of the center-of-mass energies at BESIII via the di-muon process
journal, June 2016