/ hep-ex arXiv:1712.09240


Observation of $e^{+}e^{-} \to \phi\chi_{c1}$ and $\phi\chi_{c2}$ at $\sqrt{s}$=4.600 GeV


Ablikim, Medina (Beijing, Inst. High Energy Phys.) ; Achasov, Mikhail N (Novosibirsk, IYF) ; Ahmed, Samer Ali Nasher (Helmholtz Inst., Mainz) ; Albrecht, Malte (Ruhr U., Bochum) ; Amoroso, Antonio (INFN, Turin) ; An, Fenfen (Beijing, Inst. High Energy Phys.) ; An, Qi (Hefei, CUST) ; Bai, Jingzhi (Beijing, Inst. High Energy Phys.) ; Bai, Yu ; Bakina, Olga (Dubna, JINR) ; Baldini Ferroli, Rinaldo (Frascati) ; Ban, Yong (Peking U., Beijing) ; Bennett, Dan (Indiana U.) ; Bennett, Jake (Carnegie Mellon U.) ; Berger, Niklaus (Mainz U.) ; Bertani, Monica (Frascati) ; Bettoni, Diego (INFN, Ferrara) ; Bian, Jianming (Minnesota U.) ; Bianchi, Fabrizio (INFN, Turin) ; Boger, Evgeny (Dubna, JINR) ; Boyko, Igor (Dubna, JINR) ; Briere, Roy (Carnegie Mellon U.) ; Cai, Hao (Wuhan U.) ; Cai, Xiao (Beijing, Inst. High Energy Phys.) ; Cakir, Orhan (Ankara U.) ; Calcaterra, Alessandro (Frascati) ; Cao, Guofu (Beijing, GUCAS) ; Cetin, Serkant Ali (Istanbul Bilgi U.) ; Chai, Junying (INFN, Turin) ; Chang, Jinfan (Beijing, Inst. High Energy Phys.) ; Chelkov, Georgy (Dubna, JINR) ; Chen, Gang (Beijing, Inst. High Energy Phys.) ; Chen, Hesheng (Beijing, GUCAS) ; Chen, Jiangchuan (Beijing, Inst. High Energy Phys.) ; Chen, Mary (Beijing, Inst. High Energy Phys.) ; Chen, Pingliang (U. South China, Hengyang) ; Chen, Shenjian (Nanjing U.) ; Chen, Xurong (Lanzhou U.) ; Chen, Yuanbo (Beijing, Inst. High Energy Phys.) ; Chu, xinkun (Peking U., Beijing) ; Cibinetto, Gianluigi (INFN, Ferrara) ; Dai, Hongliang (Beijing, Inst. High Energy Phys.) ; Dai, JianPing (Shanghai Jiaotong U.) ; Dbeyssi, Alaa (Helmholtz Inst., Mainz) ; Dedovich, Dmitry (Dubna, JINR) ; Deng, Ziyan (Beijing, Inst. High Energy Phys.) ; Denig, Achim (Mainz U.) ; Denysenko, Igor (Dubna, JINR) ; Destefanis, Marco (INFN, Turin) ; De Mori, Francesca (INFN, Turin) ; Ding, Yong (Liaoning U.) ; Dong, Chao (Nankai U.) ; Dong, Jing (Beijing, Inst. High Energy Phys.) ; Dong, Liaoyuan (Beijing, GUCAS) ; Dong, Mingyi (Beijing, Inst. High Energy Phys.) ; Dou, Zhenglei (Nanjing U.) ; Du, Shuxian (Zhengzhou U.) ; Duan, Pengfei (Beijing, Inst. High Energy Phys.) ; Fang, Jian (Beijing, Inst. High Energy Phys.) ; Fang, Shuangshi (Beijing, GUCAS) ; Fang, Yi (Beijing, Inst. High Energy Phys.) ; Farinelli, Riccardo (Ferrara U.) ; Fava, Luciano (INFN, Turin) ; Fegan, Stuart (Mainz U.) ; Feldbauer, Florian (Mainz U.) ; Felici, Giulietto (Frascati) ; Feng, Changqing (Hefei, CUST) ; Fioravanti, Elisa (INFN, Ferrara) ; Fritsch, Miriam (Helmholtz Inst., Mainz) ; Fu, Chengdong (Beijing, Inst. High Energy Phys.) ; Gao, Qing (Beijing, Inst. High Energy Phys.) ; Gao, Xinlei (Hefei, CUST) ; Gao, Yuanning (Tsinghua U., Beijing) ; Gao, Yonggui (CCNU, Wuhan, Inst. Part. Phys.) ; Gao, Zhen (Hefei, CUST) ; Garzia, Isabella (INFN, Ferrara) ; Goetzen, Klaus (Darmstadt, GSI) ; Gong, Li (Nankai U.) ; Gong, Wenxuan (Beijing, Inst. High Energy Phys.) ; Gradl, Wolfgang (Mainz U.) ; Greco, Michela (INFN, Turin) ; Gu, Minhao (Beijing, Inst. High Energy Phys.) ; Gu, Yunting (Guangxi U.) ; Guo, Aiqiang (Beijing, Inst. High Energy Phys.) ; Guo, Rupan (Beijing, GUCAS) ; Guo, Yuping (Mainz U.) ; Haddadi, Zahra (Groningen, KVI) ; Han, Shuang (Wuhan U.) ; Hao, Xiqing (Henan Normal U.) ; Harris, Frederick A (Hawaii U.) ; He, Kanglin (Beijing, GUCAS) ; He, Xiqin (USTL, Anshan) ; Heinsius, Fritz-Herbert (Ruhr U., Bochum) ; Held, Thomas (Ruhr U., Bochum) ; Heng, Yuekun (Beijing, Inst. High Energy Phys.) ; Holtmann, Tobias (Ruhr U., Bochum) ; Hou, Zhilong (Beijing, Inst. High Energy Phys.) ; Hu, Haiming (Beijing, GUCAS) ; Hu, Tao (Beijing, Inst. High Energy Phys.) ; Hu, Yu (Beijing, Inst. High Energy Phys.) ; Huang, Guangshun (Hefei, CUST) ; Huang, Jinshu (Henan Normal U.) ; Huang, Xingtao (Shandong U.) ; Huang, Xiaozhong (Nanjing U.) ; Huang, Zhiling (Liaoning U.) ; Hussain, Talab (Punjab U.) ; Ikegami Andersson, Walter (Uppsala U.) ; Ji, Quan (Beijing, Inst. High Energy Phys.) ; Ji, Qingping (Henan Normal U.) ; Ji, Xiaobin (Beijing, GUCAS) ; Ji, Xiaolu (Beijing, Inst. High Energy Phys.) ; Jiang, Xiaoshan (Beijing, Inst. High Energy Phys.) ; Jiang, Xingyu (Nankai U.) ; Jiao, Jianbin (Shandong U.) ; Jiao, Zheng (Huangshan U.) ; Jin, Dapeng (Beijing, Inst. High Energy Phys.) ; Jin, Shan (Beijing, GUCAS) ; Jin, Yi ; Johansson, Tord (Uppsala U.) ; Julin, Andy (Minnesota U.) ; Kalantar-Nayestanaki, Nasser (Groningen, KVI) ; Kang, Xiaolin (Beijing, Inst. High Energy Phys.) ; Kang, Xiaoshen (Nankai U.) ; Kavatsyuk, Myroslav (Groningen, KVI) ; Ke, Bai-Cian (Carnegie Mellon U.) ; Khan, Tabassum (Hefei, CUST) ; Khoukaz, Alfons ; Kiese, Patric (Mainz U.) ; Kliemt, Ralf (Darmstadt, GSI) ; Koch, Leonard (Giessen U.) ; Kolcu, Onur Bugra (Istanbul Bilgi U.) ; Kopf, Bertram (Ruhr U., Bochum) ; Kornicer, Mihajlo (Hawaii U.) ; Kuemmel, Miriam (Ruhr U., Bochum) ; Kuessner, Meike (Ruhr U., Bochum) ; Kuhlmann, Markus (Ruhr U., Bochum) ; Kupsc, Andrzej (Uppsala U.) ; K\"uhn, Wolfgang Kuehn (Giessen U.) ; Lange, Jens Soeren (Giessen U.) ; Lara, Manuel (Indiana U.) ; Larin, Paul (Helmholtz Inst., Mainz) ; Lavezzi, Lia (Beijing, Inst. High Energy Phys.) ; Leithoff, Heinrich (Mainz U.) ; Leng, Chongyang (INFN, Turin) ; Li, Cui (Uppsala U.) ; Li, Cheng (Hefei, CUST) ; Li, Demin (Zhengzhou U.) ; Li, Fei (Beijing, Inst. High Energy Phys.) ; Li, Fengyun (Peking U., Beijing) ; Li, Gang (Beijing, Inst. 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High Energy Phys.) ; Liu, Feng (CCNU, Wuhan, Inst. Part. Phys.) ; Liu, Hongbang (Guangxi U.) ; Liu, Huaimin (Beijing, GUCAS) ; Liu, Huanhuan (Beijing, Inst. High Energy Phys.) ; Liu, Huihui (Henan U. Sci. Technol.) ; Liu, Jianbei (Hefei, CUST) ; Liu, Jueping (Wuhan U.) ; Liu, Jingyi (Beijing, GUCAS) ; Liu, Kai (Tsinghua U., Beijing) ; Liu, Kuiyong (Liaoning U.) ; Liu, Ke (CCNU, Wuhan, Inst. Part. Phys.) ; Liu, Landiao (Peking U., Beijing) ; Liu, Peilian (Beijing, Inst. High Energy Phys.) ; Liu, Qian (Beijing, GUCAS) ; Liu, Shubin (Hefei, CUST) ; Liu, Xiang (Lanzhou U.) ; Liu, Yu-Bin (Nankai U.) ; Liu, Zhenan (Beijing, Inst. High Energy Phys.) ; Liu, Zhiqing (Mainz U.) ; Long, Yunfei (Peking U., Beijing) ; Lou, Xinchou (Beijing, Inst. High Energy Phys.) ; Lu, Hai-jiang (Huangshan U.) ; Lu, Junguang (Beijing, Inst. High Energy Phys.) ; Lu, Yu (Beijing, Inst. High Energy Phys.) ; Lu, Yunpeng (Beijing, Inst. High Energy Phys.) ; Luo, Chenglin (Nanjing Normal U.) ; Luo, Mingxing (Zhejiang U.) ; Luo, Xiaolan (Beijing, Inst. High Energy Phys.) ; Lyu, Xiao-Rui (Beijing, GUCAS) ; Ma, Fengcai (Liaoning U.) ; Ma, Hailong (Beijing, Inst. High Energy Phys.) ; Ma, Lianliang (Shandong U.) ; Ma, Mingming (Beijing, GUCAS) ; Ma, Qiumei (Beijing, Inst. High Energy Phys.) ; Ma, Tian (Beijing, Inst. High Energy Phys.) ; Ma, Xuning (Nankai U.) ; Ma, Xiaoyan (Beijing, Inst. High Energy Phys.) ; Ma, YuMing (Shandong U.) ; Maas, Frank (Helmholtz Inst., Mainz) ; Maggiora, Marco (INFN, Turin) ; Malik, Qadeer Afzal (Punjab U.) ; Mao, Yajun (Peking U., Beijing) ; Mao, Zepu (Beijing, Inst. High Energy Phys.) ; Marcello, Simonetta (INFN, Turin) ; Meng, Zhaoxiao ; Messchendorp, Johan (Groningen, KVI) ; Mezzadri, Giulio (Ferrara U.) ; Min, Jian (Beijing, Inst. High Energy Phys.) ; Min, Tianjue (Beijing, Inst. High Energy Phys.) ; Mitchell, Ryan (Indiana U.) ; Mo, Xiaohu (Beijing, Inst. High Energy Phys.) ; Mo, Yujin (CCNU, Wuhan, Inst. Part. Phys.) ; Morales Morales, Cristina (Helmholtz Inst., Mainz) ; Muchnoi, Nikolai Yu (Novosibirsk, IYF) ; Muramatsu, Hajime (Minnesota U.) ; Musiol, Patrick (Ruhr U., Bochum) ; Mustafa, Arber (Ruhr U., Bochum) ; Nefedov, Yury (Dubna, JINR) ; Nerling, Frank (Darmstadt, GSI) ; Nikolaev, Ivan (Novosibirsk, IYF) ; Ning, Zhe (Beijing, Inst. High Energy Phys.) ; Nisar, Shabana (COMSATS, Lahore) ; Niu, Shunli (Beijing, Inst. High Energy Phys.) ; Niu, Xunyi (Beijing, GUCAS) ; Olsen, Stephen L (Seoul Natl. U.) ; Ouyang, Qun OuYang (Beijing, Inst. High Energy Phys.) ; Pacetti, Simone (Perugia U.) ; Pan, Yue (Hefei, CUST) ; Papenbrock, Michael (Uppsala U.) ; Patteri, Piero (Frascati) ; Pelizaeus, Marc (Ruhr U., Bochum) ; Pellegrino, Jacopo (INFN, Turin) ; Peng, Haiping (Hefei, CUST) ; Peters, Klaus (Darmstadt, GSI) ; Pettersson, Joachim (Uppsala U.) ; Ping, Jialun (Nanjing Normal U.) ; Ping, Ronggang (Beijing, GUCAS) ; Pitka, Andreas (Mainz U.) ; Poling, Ronald (Minnesota U.) ; Prasad, Vindhyawasini (Hefei, CUST) ; Qi, Hongrong (BeiHang U.) ; Qi, Ming (Nanjing U.) ; Qian, Sen (Beijing, Inst. High Energy Phys.) ; Qiao, Cong-Feng (Beijing, GUCAS) ; Qin, Nian (Wuhan U.) ; Qin, Xiaoshuai (Ruhr U., Bochum) ; Qin, Zhonghua (Beijing, Inst. High Energy Phys.) ; Qiu, Jinfa (Beijing, Inst. High Energy Phys.) ; Rashid, Khawaja Haris (Punjab U.) ; Redmer, Christoph (Mainz U.) ; Richter, Marvin (Ruhr U., Bochum) ; Ripka, Martin (Mainz U.) ; Rolo, Manuel (INFN, Turin) ; Rong, Gang (Beijing, GUCAS) ; Rosner, Christoph (Helmholtz Inst., Mainz) ; Sarantsev, Andrei (Dubna, JINR) ; Savri\'e, Mauro Savrié (Ferrara U.) ; Schnier, Claudius (Ruhr U., Bochum) ; Schoenning, Karin (Uppsala U.) ; Shan, Wei (Peking U., Beijing) ; Shao, Ming (Hefei, CUST) ; Shen, Chengping (BeiHang U.) ; Shen, Peixun (Nankai U.) ; Shen, Xiaoyan (Beijing, GUCAS) ; Sheng, Huayi (Beijing, Inst. High Energy Phys.) ; Song, Jiaojiao (Shandong U.) ; Song, Weimin (Shandong U.) ; Song, Xinying (Beijing, Inst. High Energy Phys.) ; Sosio, Stefano (INFN, Turin) ; Sowa, Cathrina (Ruhr U., Bochum) ; Spataro, Stefano (INFN, Turin) ; Sun, Gongxing (Beijing, Inst. High Energy Phys.) ; Sun, Junfeng (Henan Normal U.) ; Sun, Liang (Wuhan U.) ; Sun, Shengsen (Beijing, GUCAS) ; Sun, Xinhua (Beijing, Inst. 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High Energy Phys.) ; Yuncu, Alperen (Istanbul Bilgi U.) ; Zafar, Abrar Ahmad (Punjab U.) ; Zeng, Yun (Hunan U.) ; Zeng, Zhe (Hefei, CUST) ; Zhang, Bingxin (Beijing, Inst. High Energy Phys.) ; Zhang, Bingyun (Beijing, Inst. High Energy Phys.) ; Zhang, Changchun (Beijing, Inst. High Energy Phys.) ; Zhang, Dahua (Beijing, Inst. High Energy Phys.) ; Zhang, Hong-Hao (SYSU, Guangzhou) ; Zhang, Hongyu (Beijing, Inst. High Energy Phys.) ; Zhang, Jin (Beijing, GUCAS) ; Zhang, Jielei (Beijing, Inst. High Energy Phys.) ; Zhang, Jingqing (Beijing, Inst. High Energy Phys.) ; Zhang, Jiawen (Beijing, Inst. High Energy Phys.) ; Zhang, Jianyong (Beijing, Inst. High Energy Phys.) ; Zhang, Jingzhi (Beijing, GUCAS) ; Zhang, Kun (Beijing, GUCAS) ; Zhang, Lei (Tsinghua U., Beijing) ; Zhang, Shiquan (Nankai U.) ; Zhang, Xueyao (Shandong U.) ; Zhang, Yinhong (Beijing, Inst. High Energy Phys.) ; Zhang, Yateng (Hefei, CUST) ; Zhang, Yang (Beijing, Inst. High Energy Phys.) ; Zhang, Yao (Beijing, Inst. High Energy Phys.) ; Zhang, Yu (Beijing, GUCAS) ; Zhang, Zhenghao (CCNU, Wuhan, Inst. Part. Phys.) ; Zhang, Ziping (Hefei, CUST) ; Zhang, Zhenyu (Wuhan U.) ; Zhao, Guang (Beijing, Inst. High Energy Phys.) ; Zhao, Jingwei (Beijing, Inst. High Energy Phys.) ; Zhao, Jingyi (Beijing, GUCAS) ; Zhao, Jingzhou (Beijing, Inst. High Energy Phys.) ; Zhao, Lei (Hefei, CUST) ; Zhao, Ling (Beijing, Inst. High Energy Phys.) ; Zhao, Minggang (Nankai U.) ; Zhao, Qiang (Beijing, Inst. High Energy Phys.) ; Zhao, Shujun (Zhengzhou U.) ; Zhao, Tianchi (Beijing, Inst. High Energy Phys.) ; Zhao, Yubin (Beijing, Inst. High Energy Phys.) ; Zhao, Zhengguo (Hefei, CUST) ; Zhemchugov, Alexey (Dubna, JINR) ; Zheng, Bo (U. South China, Hengyang) ; Zheng, Jianping (Beijing, Inst. High Energy Phys.) ; Zheng, Yangheng (Beijing, GUCAS) ; Zhong, Bin (Nanjing Normal U.) ; Zhou, Li (Beijing, Inst. High Energy Phys.) ; Zhou, Xiang (Wuhan U.) ; Zhou, Xiaokang (Hefei, CUST) ; Zhou, Xiaorong (Hefei, CUST) ; Zhou, Xingyu (Beijing, Inst. High Energy Phys.) ; Zhou, Yixiong (Guangxi U.) ; Zhu, Jiang (Nankai U.) ; Zhu, Jiang (SYSU, Guangzhou) ; Zhu, Kai (Beijing, Inst. High Energy Phys.) ; Zhu, Kejun (Beijing, Inst. High Energy Phys.) ; Zhu, Shuai (Beijing, Inst. High Energy Phys.) ; Zhu, Shihai (USTL, Anshan) ; Zhu, Xianglei (Tsinghua U., Beijing) ; Zhu, yingchun (Hefei, CUST) ; Zhu, Yongsheng (Beijing, GUCAS) ; Zhu, Zi-An (Beijing, GUCAS) ; Zhuang, Jian (Beijing, Inst. High Energy Phys.) ; Zou, Bingsong (Beijing, Inst. High Energy Phys.) ; Zou, Jiaheng (Beijing, Inst. High Energy Phys.)

Abstract: Using a data sample collected with the BESIII detector operating at the BEPCII storage ring at a center-of-mass energy of $\sqrt{s}=4.600$ GeV, we search for the production of $e^{+}e^{-} \to \phi\chi_{c0,1,2}$ and the charmonium-like state $Y(4140)$ in the radiative transition $e^{+}e^{-} \to \gamma Y(4140)$ with $Y(4140)$ subsequently decaying into $\phi J/\psi$. The processes $e^{+}e^{-} \to \phi\chi_{c1}$ and $\phi\chi_{c2}$ are observed for the first time, each with a statistical significance of more than 10\sigma, and the Born cross sections are measured to be $(4.2^{+1.7}_{-1.0}\pm 0.3)$ pb and $(6.7^{+3.4}_{-1.7}\pm 0.5)$ pb, respectively, where the first uncertainties are statistical and the second systematic. No significant signals are observed for $e^{+}e^{-} \to \phi\chi_{c0}$ and $e^{+}e^{-} \to \gamma Y(4140)$ and upper limits on the Born cross sections at $90\%$ confidence level are provided at $\sqrt{s}=4.600$ GeV.

Web-Page: http://inspirehep.net/record/1644905/files/arXiv:1712.09240.pdf


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