Search

Your search keyword '"Niu Xiaoyang"' showing total 11 results
Start Over Author "Niu Xiaoyang" Language undetermined
11 results on '"Niu Xiaoyang"'

1. Hi’Beam-S: A Monolithic Silicon Pixel Sensor-Based Prototype Particle Tracking System for HIAF

Author

Sihan Zhu, Weiping Ren, Yunpeng Lu, Xiangming Sun, Shen Wang, Niu Xiaoyang, Jun Liu, Jianhua Guo, H. M. Zhang, Xianqin Li, Hulin Wang, Yuezhao Zhang, Yang Haibo, Wei Zhou, Chaosong Gao, Jianwei Liao, Chengxin Zhao, and Rui He

Subjects
Nuclear and High Energy Physics, Materials science, Silicon, Pixel, business.industry, chemistry.chemical_element, Tracking system, Optics, Nuclear Energy and Engineering, chemistry, Particle, Electrical and Electronic Engineering, business, Beam (structure)
Published
2021
Full Text
View/download PDF

2. Hi’Beam-A: A Pixelated Beam Monitor for the Accelerator of a Heavy-Ion Therapy Facility

Author

H. M. Zhang, Cheng Qian, Yuezhao Zhang, Chengxin Zhao, Xianqin Li, Dong Wang, Ran Huang, Wei Zhou, Yao Wang, Xiangming Sun, Niu Xiaoyang, and Yang Haibo

Subjects
Physics, Nuclear and High Energy Physics, Silicon, Pixel, Physics::Instrumentation and Detectors, business.industry, Ultra-high vacuum, Detector, chemistry.chemical_element, Data acquisition, Optics, Nuclear Energy and Engineering, chemistry, Ionization, Physics::Accelerator Physics, Microchannel plate detector, Electrical and Electronic Engineering, business, Beam (structure)
Abstract

In this article, a noninterceptive and high-accuracy beam position monitor, named Hi’Beam-A, has been designed for the accelerator of a heavy-ion therapy facility. The Hi’Beam-A consists of the detector subsystem and the readout subsystem. In the detector subsystem, the microchannel plate multiplies the ionized charge in the high vacuum chamber, and the novel Topmetal silicon pixel sensor directly collects the charge. The readout subsystem processes the data and calculates the beam position. Beam test results show that the Hi’Beam-A reaches an accuracy of $5~\mu \text{m}$ . This article will present the design, characterization, and beam test of Hi’Beam-A.

Published
2021
Full Text
View/download PDF

3. Topmetal-M: a novel pixel sensor for compact tracking applications

Author

Xianqin Li, Fan Shen, Jun Liu, Dong Wang, Ping Yang, Niu Xiaoyang, Guangming Huang, Chengxin Zhao, H. Pei, Yuan Mei, Wei Zhou, Weiping Ren, Xiangming Sun, Chaosong Gao, Yubo Han, Yao Wang, Yang Haibo, Le Xiao, Shu-Guang Zou, H. M. Zhang, Xiangru Qu, Ni Fang, Bihui You, Y. H. Zhang, and Wang Yan

Subjects
Physics, Nuclear and High Energy Physics, CMOS sensor, Physics - Instrumentation and Detectors, Pixel, 010308 nuclear & particles physics, business.industry, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Tracking (particle physics), 01 natural sciences, Multiplexing, Signal, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Analog signal, Time of arrival, Optics, 0103 physical sciences, 010306 general physics, business, Instrumentation, Energy (signal processing)
Abstract

The Topmetal-M is a large area pixel sensor (18 mm × 23 mm) prototype fabricated in a new 130 nm high-resistivity CMOS process in 2019. It contains 400 rows × 512 columns square pixels with the pitch of 40 μ m . In Topmetal-M, a novel charge collection method combining the Monolithic Active Pixel Sensor (MAPS) and the Topmetal sensor has been proposed for the first time. Both the ionized charge deposited by the particle in the sensor and along the track over the sensor can be collected. The in-pixel circuit mainly consists of a low-noise charge sensitive amplifier to establish the signal for the energy reconstruction, and a discriminator with a Time-to-Amplitude Converter (TAC) for the Time of Arrival (TOA) measurement. With this mechanism, the trajectory, particle hit position, energy, and arrival time of the particle can be measured. The analog signal from each pixel is accessible through time-shared multiplexing over the entire pixel array. This paper will discuss the design and preliminary test results of the Topmetal-M sensor.

Published
2022
Full Text
View/download PDF

4. Evaluation of energy correction algorithm for signals of PET in heavy-ion cancer therapy device

Author

Chengming Du, Jie Kong, Yan Junwei, Chengxin Zhao, Hong Su, Xiuling Zhang, Ke Lingyun, Jin-Da Chen, Niu Xiaoyang, Yang Haibo, and Xiaohui Wang

Subjects
Polynomial, medicine.diagnostic_test, Computer science, 020209 energy, Double exponential function, 02 engineering and technology, lcsh:TK9001-9401, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Nuclear Energy and Engineering, Sampling (signal processing), Positron emission tomography, 0202 electrical engineering, electronic engineering, information engineering, medicine, lcsh:Nuclear engineering. Atomic power, Waveform, Tomography, Algorithm, Energy (signal processing), Emission computed tomography
Abstract

In order to solve the contradiction between requirements of high sampling rate for acquiring accurate energy information of pulses and large amount of data to be processed timely, the method with an algorithm to correct errors caused by reducing the sampling rate is normally used in front-end read-out system, which is conductive to extract accurate energy information from digitized waveform of pulse. The functions and effects of algorithms, which mainly include polynomial fitting with different fitting times, double exponential function fitting under different sampling modes, and integral area algorithm, are analyzed and evaluated, and some meaningful results is presented in this paper. The algorithm described in the paper has been used preliminarily in a prototype system of Positron Emission Tomography (PET) for heavy-ion cancer therapy facility. Keywords: Positron emission tomography, Correction algorithm, Energy extraction

Published
2020
Full Text
View/download PDF

5. Study of the D0 → K− μ+ νμ Dynamics and Test of Lepton Flavor Universality with D0→K−l+νl Decays

Author

Q. Liu, X. L. Gao, M. Bertani, C. Dong, S. Sosio, Z. Haddadi, L. L. Ma, Joachim Pettersson, L. Yang, L. Gong, H. B. Li, M. H. Ye, A. G. Denig, C. L. Luo, A. Amoroso, Q. Zhou, Y. T. Tan, C. C. Zhang, W. Gradl, B. Zhong, M. Ripka, A. Dbeyssi, Y. H. Xie, L. D. Liu, D. Y. Wang, Angelo Rivetti, J. Pellegrino, H. Muramatsu, A. N. Zhu, Ulrich Wiedner, L. Y. Dong, Bingxuan Liu, Y. H. Zheng, Cong-Feng Qiao, S. Jin, A. Julin, M. Alekseev, W. S. Cheng, Yao Zhang, Tao Zhang, G. Li, M. Kornicer, T. Ma, N. Yu. Muchnoi, X. S. Kang, A. Gilman, M. Maggiora, Kai Liu, W. M. Song, W. J. Zheng, Xu Shan, Y. H. Zhang, X. L. Ji, C. D. Fu, C. Q. Feng, X. R. Chen, G. F. Xu, S. B. Liu, L. Zhang, Y. Nefedov, F. Nerling, Lei Zhao, Z. Y. Deng, Z. Y. Wang, Z. L. Hou, Z. G. Wang, H. Y. Zhang, Xingguo Li, F. Li, F. C. Ma, Fang Liu, Y. G. Xie, X. Y. Song, R. Kliemt, Y. Hu, Haiwen Liu, Y. X. Yang, Kang Li, A. Mangoni, L. J. Wu, A. Guskov, J. C. Li, Cui Li, S. X. Du, K. Goetzen, Jie Yu, Y. J. Mo, Z. L. Dou, J. F. Qiu, F. De Mori, J. Zhuang, M. X. Luo, L. Fava, G. S. Huang, K. J. Zhu, Meng Wang, D. V. Dedovich, X. Y. Zhou, Xu Zhou, T. Khan, Xiao-Rui Lyu, C. Z. Yuan, Q. Zhao, G. F. Chen, Y. Z. Sun, Q. P. Ji, Ke Li, G. Cibinetto, I. Uman, Liqing Xu, X. Y. Shen, Y. G. Gao, X. F. Wang, G. S. Varner, J. Y. Zhang, L. Koch, A. Khoukaz, Yang Zhang, F. Feldbauer, C. X. Lin, J. Z. Bai, Z. L. Huang, Y. Ding, Q. M. Ma, A. Mustafa, B. J. Liu, Gang Zhao, Feng Liu, P. Larin, M. Ablikim, X D Shi, A. Calcaterra, Z. G. Zhao, S. Fegan, W. Kühn, Y. J. Mao, L. Z. Liao, T. Holtmann, L. Yan, Y. Yuan, Y. S. Zhu, P. Wang, M. Kuessner, Z. Y. You, J. Y. Liu, H. H. Zhang, Yu Zhang, Z. J. Sun, Xinglong Li, H. X. Yang, I. Garzia, Z. A. Zhu, T. Weber, X. B. Ji, M. Tiemens, C. P. Shen, J. L. Zhang, M. H. Gu, R. Kiuchi, X. N. Ma, H. Y. Sheng, T. Y. Qi, Michael Papenbrock, Q. Gao, Y. N. Gao, F. Yan, B. Wang, P. L. Wang, G. A. Chelkov, P. Patteri, C. X. Yu, Y. X. Xia, S. H. Zhu, J. J. Xu, Z. Q. Yang, M. Kavatsyuk, P. Kiese, B. Garillon, Huihui Liu, Haiping Peng, Muhammad Irshad, J. S. Huang, C. X. Liu, Bibo Ke, Z. J. Xiao, S. L. Olsen, B. Zheng, R. G. Ping, W. B. Yan, J. G. Messchendorp, R. A. Briere, M. N. Achasov, H. J. Lu, Ke Wang, X. K. Chu, J. G. Lu, J. P. Dai, G. Y. Tang, S. Pacetti, B. X. Zhang, F. A. Harris, F. E. Maas, Y. K. Heng, X. S. Jiang, Jie Zhao, D. X. Lin, T. Hu, Qiunan Xu, P. F. Duan, Alexey Zhemchugov, H. M. Hu, H. Leithoff, O. Bakina, A. Q. Guo, Z. Y. Peng, G. Rong, Fenfen An, B. L. Wang, S. J. Zhao, J. W. Zhang, P. X. Shen, T. C. Zhao, X. K. Zhou, Jinxing Zheng, I. Denysenko, O. Cakir, J. F. Hu, Z. Wu, C. F. Redmer, Q. J. Xu, W. C. Yan, Zhiyong Zhang, R. Farinelli, C. Schnier, H. L. Ma, W. P. Wang, J. C. Chen, Xuanhong Lou, Zhiqing Zhang, I. B. Nikolaev, B. X. Yu, J. H. Yin, D. Y. Liu, J. B. Jiao, Z. T. Sun, D. M. Li, Z. H. Qin, M. Shao, Y. T. Gu, Zhi Zeng, Nasser Kalantar-Nayestanaki, B. Y. Zhang, X. T. Huang, C. Morales Morales, Jin Li, Y. Ban, P. Weidenkaff, F. H. Heinsius, M. Y. Dong, V. Prasad, S. Han, M. Pelizaeus, W. G. Li, E. Fioravanti, Y. K. Sun, Xiaoyu Zhou, S. P. Wen, X. R. Zhou, H. S. Chen, H. L. Dai, Igor Boyko, H. B. Liu, J. H. Zou, Cheng Li, S. Spataro, X. P. Xu, L. H. Wu, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, M. G. Zhao, Y. H. Yang, R. P. Guo, J. Zhu, Yi Jin, Lei Li, J. W. Li, L. Xia, S. S. Sun, X. S. Qin, J. Q. Zhang, S. L. Niu, F. Y. Li, X. Q. Li, Y. F. Long, Y. J. Xiao, M. Greco, R. Baldini Ferroli, Niu Xiaoyang, R. E. Mitchell, Z. X. Meng, H. Liang, M. Fritsch, S. Ahmed, Ke Liu, Q. A. Malik, G. Mezzadri, X. Q. He, L. P. Zhou, Y. M. Ma, Z. P. Mao, X. A. Xiong, J. Fang, Z. Gao, Ch. Rosner, A. A. Zafar, Magnus Wolke, Y. F. Liang, G. F. Cao, K. Y. Liu, S. Qian, Q. An, Jialun Ping, D. P. Jin, K. H. Rashid, Z. B. Li, K. Zhang, Y. T. Liang, X. Y. Zhang, S. J. Chen, W. Ikegami Andersson, Y. F. Wang, K. J. Li, J. Libby, Dayong Wang, N. Qin, M. Lara, X. H. Mo, L. S. Wang, Xiaozhong Huang, Yaquan Fang, A. Pitka, J. B. Liu, Y. J. Sun, Yifan Yang, Andrzej Kupsc, T. Hussain, J. F. Sun, X. Y. Ma, Z. Liu, M. L. Chen, K. Schoenning, Q. Y. Li, B. S. Zou, S. Marcello, Y. P. Lu, Niklaus Berger, Y. Zeng, W. X. Gong, S. Lusso, L. L. Wang, H. Cai, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, J. J. Song, L. Sun, M. Kuemmel, Matthew Glenn Kurth, W. Shan, X. H. Sun, Dan Wang, Krisztian Peters, G. R. Liao, X. Liu, H. R. Qi, X. L. Luo, K. Begzsuren, F. Bianchi, Serkant Ali Cetin, Zongyuan Wang, Q. Ouyang, S. S. Fang, Y. B. Liu, Huanhuan Liu, G. Felici, H. J. Li, Q. L. Xiu, X. Tang, A. Yuncu, M. Rolo, F. Cossio, Yunlong Zhang, H. L. Liu, D. Bettoni, R. Poling, S. Zhu, M. Destefanis, M. Qi, H. J. Yang, X. Zhou, I. Tapan, Y. H. Yan, J. W. Zhao, Y. C. Zhu, Y. Zhang, E. Boger, T. Held, M. Albrecht, W. D. Li, B. T. Tsednee, J. Min, Ling Zhao, B. Kopf, K. L. He, M. Z. Wang, Jimin Zhao, P. L. Li, S. F. Zhang, Zhiqing Liu, T. Johansson, J. F. Chang, O. B. Kolcu, X. Cai, L. Lavezzi, X. Q. Hao, M. Richter, Z. Ning, Jun-Yi Zhang, Y. P. Guo, Z. P. Zhang, P. L. Chen, D. W. Bennett, Zujian Wang, Y. Bai, C. Sowa, Y. B. Zhao, J. Dong, Y. Q. Wang, S. Nisar, C. J. Tang, D. Xiao, X. Y. Jiang, M. M. Ma, Y. Pan, J. Chai, G. X. Sun, J. V. Bennett, Z. Jiao, Fu-Hu Liu, and D. H. Zhang

Subjects
Physics, Particle physics, Flavor, Lepton, Universality (dynamical systems)
Published
2020
Full Text
View/download PDF

6. Precise Measurement of the e+e− → π+π−J/ψ Cross Section at Center-of-Mass Energies from 3.77 to 4.60 GeV

Author

S. Han, Haiwen Liu, G. X. Sun, M. Savrie, J. M. Bian, Qun Ouyang, Y.N. Gao, L. Xia, Wolfgang Kuhn, P. F. Duan, A. Calcaterra, X. S. Jiang, Kanglin He, D. Y. Wang, S. H. Zhu, D. P. Jin, Xiao-Rui Lyu, H. Y. Sheng, J. S. Huang, A. Sarantsev, L. H. Wu, M. Tiemens, X. S. Qin, Xian Gao, C. Leng, M. Shao, B. L. Wang, Jianyu Zhang, L. B. Guo, D. H. Wei, E. Fioravanti, P. Musiol, C. F. Redmer, C. Schnier, Zhenyu Zhang, M. Ablikim, Yu Zhang, A. A. Zafar, B. J. Liu, Lei Zhao, X. D. Ruan, Y. J. Sun, Tao Hu, I. Tapan, Jia Liu, I. B. Nikolaev, Ding-Xiong Wang, Q. P. Ji, J. M. Zhang, R. Farinelli, Jie Zhang, L. L. Ma, L. Gong, Jingzhou Zhao, Guangshun Huang, L. Yan, Wang Zengqiang, Niu Xiaoyang, Z. Jiao, Z. J. Sun, H. L. Dai, H. X. Yang, C. Morales Morales, C. L. Luo, J. Z. Bai, Zhiqing Liu, Yuanbo Chen, Z. P. Mao, Y. P. Guo, Y. S. Zhu, Y. B. Liu, F. Feldbauer, Z. Y. You, H. H. Liu, X. L. Ji, H. H. Zhang, Michela Greco, Guangyu Zhao, J. W. Zhao, Jie Zhao, Gang Li, G. S. Varner, M. G. Zhao, Bibo Ke, Jia Xu, L. Zotti, Yuekun Heng, H. Muramatsu, J.H. Yin, H. Xiao, Hao Liang, Krisztian Peters, A. Amoroso, M. Wolke, B. Zhong, E. Boger, Lei Xu, Yongke Zhao, M. Fritsch, X. Y. Ma, Minglin Ma, L. G. Xia, M. N. Achasov, L. Yang, Xinying Song, P. Wang, D. J. Ambrose, I. Denysenko, Giulietto Felici, S. Pacetti, Xuan Zhang, N. Kalantar-Nayestanaki, Jie Liu, A. Yuncu, Chang-Zheng Yuan, Y. J. Mo, J. G. Messchendorp, Jin Li, Yingchun Zhu, M. Pelizaeus, Xiaocong Ai, Q. L. Xiu, Y. F. Wang, O. B. Kolcu, F. F. An, Y. H. Guan, F. Y. Li, R. Baldini Ferroli, A. Q. Guo, L. Fava, L. Zhang, X. R. Chen, H. Loehner, Y. F. Liang, Ming-Xing Luo, Jiajun Zheng, L. L. Wang, M. Destefanis, H. S. Chen, G. Rong, Y. T. Gu, B. Wang, J. F. Hu, T. Weber, H. Y. Zhang, Jianhao Zhang, M. Albrecht, Zheng Wang, Jianbei Liu, W. Shan, Dan Bennett, Ming Qi, X. Q. Hao, Z. Wu, Jianguo Zhang, O. Albayrak, G. A. Chelkov, Z. H. Qin, O. Bakina, M. H. Ye, S. Marcello, Talib Hussain, R. A. Briere, A. Julin, I. Uman, Chen Hu, J. F. Chang, X. K. Zhou, Y. Q. Wang, Yun-Zhi Zhang, Y. P. Lu, W. M. Song, Zhi Zeng, Y. N. Zhang, Qiang Zhao, S. Nisar, Meng Wang, X. S. Kang, Zhanwen Zhu, T. Held, Y. H. Yan, Wu Li, Xiang Li, Zhengguo Zhao, Feng Liu, Ling Zhao, Y. Ma, B. Kopf, D. M. Li, Y. Hu, T. Ma, M. Ripka, P. X. Shen, Wenbiao Yan, Kai Liu, Cunming Liu, Cui Li, N. Yu. Muchnoi, H. Cai, P. Weidenkaff, Yanwei Wang, L. D. Liu, Hong Ma, B. Y. Zhang, L. W. Jiang, Tiefu Zhao, G. Mezzadri, W. C. Yan, Xin Fang, R. Poling, G. R. Liao, X. W. Tang, S. L. Niu, M. Kornicer, Changjian Tang, X. H. Mo, W. P. Wang, Zhiqing Zhang, S. Spataro, S. S. Fang, Jingzhou Fan, D. Xiao, Li Zhou, Y. G. Xie, Yunpeng Lu, X. P. Xu, R. E. Mitchell, Y. Xia, X. K. Chu, W. J. Zheng, Shujun Zhao, J. F. Sun, Q. A. Malik, B. Kloss, D. H. Zhang, Y. Nefedov, Z. L. Dou, R. P. Guo, J. Liu, X. Y. Jiang, L. Q. Qin, F. Nerling, Zhao-Long Wang, K. Zhang, J. Lange, M. Bertani, F. A. Harris, Z. Y. Deng, M. H. Gu, W. Ikegami Andersson, X. Z. Cai, Yong Liu, D. Bettoni, Tord Johansson, C. Dong, H. J. Lu, Cunfeng Feng, Yi Fang, L. Lavezzi, K. H. Rashid, H. M. Hu, N. Qin, Lei Li, P. R. Li, Orhan Cakir, S. Sosio, Jiemin Li, Y. Z. Sun, J. L. Ping, W. X. Gong, Z. L. Hou, U. Wiedner, G. F. Xu, P. Kiese, G. Cibinetto, Siyuan Sun, Jia-ju Zhang, P. L. Liu, X. L. Luo, Y. Zhang, Zahra Haddadi, Qingnian Xu, Xiaozhong Huang, Ye-Fei Yuan, F. C. Ma, A. Denig, H. B. Liu, S. B. Liu, X. Y. Shen, Z. Gao, Mingshui Chen, Y. Pan, X. L. Kang, Q. J. Xu, Ch. Rosner, Q. W. Zhao, J. Chai, Xu Zhou, Ka-Yuet Liu, Joachim Pettersson, Andrzej Kupsc, X. C. Lou, Zhen Wang, Yiming Zhang, H. B. Li, F. De Mori, Shou-hua Zhu, Z. Liu, Fu-Hu Liu, L. J. Wu, Y. Zeng, P. Larin, F. E. Maas, W. F. Wang, S. X. Du, Cen Zhang, Teng Li, B. S. Zou, W. Gradl, X. L. Li, C. F. Qiao, J. P. Dai, S. Ahmed, Y. X. Yang, K. Schoenning, Q. Y. Li, J. V. Bennett, Niklaus Berger, K. Li, X. N. Ma, Jianbin Jiao, Y. Ding, L. S. Wang, Y. T. Liang, B. X. Yu, A. Hafner, X. H. Sun, Dmitri Dedovich, Xiang Zhou, Z. B. Li, K. Goetzen, I. Boyko, H. P. Peng, I. Garzia, B. X. Zhang, S. Z. Chen, Y. J. Mao, M. Kavatsyuk, T. Holtmann, G. F. Cao, E. H. Thorndike, Q. Gao, Fabrizio Bianchi, Q. An, J. Y. Zhang, Yuehong Xie, A. Zhemchugov, S. P. Wen, X. B. Ji, Y. Guo, Xingtao Huang, M. Y. Dong, Y. B. Li, Qingming Ma, Kai Zhu, Z. L. Huang, J. C. Chen, S. Qian, Xiang Liu, Xiaoyu Li, Jiaheng Zou, Chunxu Yu, T. J. Min, T. Luo, Junguang Lu, M. Maggiora, J. S. Yu, R. Kliemt, Guo-Ming Chen, H. Leithoff, Qi Liu, X. D. Chen, Y. H. Zheng, Fang Liu, Bingxuan Liu, H. J. Li, M. Ye, S. Jin, S. L. Olsen, C. P. Shen, Sai-Juan Chen, Jian Zhuang, M. Lara, Y. D. Wang, Wei Li, R. G. Ping, Hongji Yang, Kejun Zhu, Zhiyong Zhang, H. R. Qi, Z. J. Xiao, J. Min, C. D. Fu, Serkant Ali Cetin, P. Patteri, D. Y. Liu, Jianmin Dong, Jian Fang, Yong Ban, J. F. Qiu, S. Q. Zhang, Z. Ning, D. X. Lin, Xuejun Wang, Kai Wang, B. Zheng, Z. T. Sun, V. Prasad, L. Y. Dong, Xianglei Zhu, F. H. Heinsius, X. R. Zhou, Cheng Li, and A. Dbeyssi

Subjects
Nuclear physics, Physics, Cross section (physics), Sigma, Center of mass, Resonance (particle physics), Belle experiment, Storage ring
Abstract

The cross section for the process e(+)e(-)-> pi(+) pi(-) J/psi is measured precisely at center-of-mass energies from 3.77 to 4.60 GeV using 9 fb(-1) of data collected with the BESIII detector operating at the BEPCII storage ring. Two resonant structures are observed in a fit to the cross section. The first resonance has a mass of (222.0 +/- 3.1 +/- 1.4) MeV/ c(2) and a width of (44.1 +/- 4.3 +/- 2.0)MeV, while the second one has a mass of (4320.0 +/- 10.4 +/- 7.0)MeV/c(2) and a width of (101.4(- 19.7)(+25.3) +/- 10.2) MeV, where the first errors are statistical and second ones are systematic. The first resonance agrees with the Y(4260) resonance reported by previous experiments. The precision of its resonant parameters is improved significantly. The second resonance is observed in e(+)e(-)-> pi(+) pi(-) J/psi for the first time. The statistical significance of this resonance is estimated to be larger than 7.6 sigma. The mass and width of the second resonance agree with the Y(4360) resonance reported by the BABAR and Belle experiments within errors. Finally, the Y(4008) resonance previously observed by the Belle experiment is not confirmed in the description of the BESIII data.

Published
2020
Full Text
View/download PDF

7. Amplitude Analysis of Ds+→π+π0η and First Observation of the W -Annihilation Dominant Decays Ds+→a0(980)+π0 and Ds+→a0(980)0π+

Author

Y. K. Sun, Xiaoyu Zhou, Q. P. Ji, S. Spataro, X. P. Xu, T. Khan, Lei Li, J. F. Sun, F. Feldbauer, Z. L. Huang, Feng Liu, Bibo Ke, W. B. Yan, M. N. Achasov, G. F. Cao, X. Tang, M. Ablikim, S. Pacetti, Bingxuan Liu, S. Jin, Xiang Liu, A. Q. Guo, G. Rong, S. Marcello, Ke Li, A. Yuncu, W. S. Cheng, Yao Zhang, G. Li, A. Gilman, J. C. Li, Y. Zeng, S. Lusso, F. Li, M. Rolo, X. N. Ma, B. Wang, M. Qi, J. Y. Liu, M. Kavatsyuk, J. Zhuang, M. X. Luo, F. C. Ma, S. B. Liu, B. X. Zhang, Ke Wang, C. D. Fu, C. Q. Feng, W. P. Wang, X. R. Chen, Z. Y. Deng, D. V. Dedovich, L. Zhang, Y. Nefedov, Xu Zhou, Z. H. Qin, J. Libby, Xingguo Li, Q. Gao, X D Shi, Y. J. Mao, F. Cossio, K. J. Zhu, X. K. Zhou, Fang Liu, Y. N. Gao, Y. B. Chen, R. Kliemt, Xiaofeng Zhu, J. Z. Zhang, I. Denysenko, H. X. Yang, I. Garzia, J. F. Qiu, Z. G. Wang, H. J. Yang, L. Fava, H. Y. Zhang, A. Mangoni, Yaquan Fang, A. Guskov, J. J. Song, Jun-Yi Zhang, Jie Yu, Cui Li, W. C. Yan, L. Sun, M. Richter, Y. F. Wang, Y. P. Guo, S. Ahmed, S. Qian, Q. An, Jialun Ping, A. Calcaterra, Z. G. Zhao, L. Z. Liao, B. Garillon, Huihui Liu, Fenfen An, Y. X. Yang, Kang Li, Haiwen Liu, J. G. Messchendorp, Yang Zhang, Andrzej Kupsc, A. Pitka, X. L. Gao, K. Zhang, B. Y. Zhang, J. P. Dai, H. H. Zhang, T. C. Zhao, G. Cibinetto, Z. P. Zhang, Z. Ning, S. Y. Xiao, Z. J. Sun, X. Y. Zhang, Q. Zhao, Y. Z. Sun, M. Kuemmel, Matthew Glenn Kurth, X. L. Wang, W. Shan, C. Dong, S. Sosio, G. F. Chen, M. L. Chen, S. Maldaner, Xiang Zhou, I. K. Keshk, X. F. Cui, C. X. Lin, Xiao-Rui Lyu, Tao Luo, J. B. Liu, T. Hussain, Gang Zhao, J. Z. Bai, M. Y. Dong, Q. Liu, J. Y. Zhang, X. Y. Ma, P. L. Wang, Y. J. Sun, Yifan Yang, K. Schoenning, Q. Y. Li, B. S. Zou, C. F. Redmer, W. X. Gong, H. B. Li, A. G. Denig, C. L. Luo, Q. Zhou, Joachim Pettersson, Muhammad Irshad, Y. G. Gao, L. K. Li, L. L. Ma, Niklaus Berger, Zujian Wang, V. Rodin, R. Farinelli, L. Gong, Y. Zhang, C. C. Zhang, B. X. Yu, B. Zhong, Y. P. Lu, Yunlong Zhang, W. J. Zhu, Michael Papenbrock, F. Yan, Y. Bai, X. T. Huang, H. L. Ma, D. Bettoni, H. B. Liu, F. A. Harris, Z. T. Sun, X. B. Ji, J. H. Zou, Q. A. Malik, D. M. Li, G. Mezzadri, A. Amoroso, H. Muramatsu, A. N. Zhu, Ulrich Wiedner, X. Q. He, M. Bertani, Tao Zhang, H. Leithoff, R. Poling, Y. H. Yan, Jin Li, K. Goetzen, P. Patteri, Z. J. Xiao, X. L. Ji, R. X. Yang, Jianping Zheng, T. Ma, L. P. Zhou, J. W. Zhao, M. Pelizaeus, L. Yang, A. Dbeyssi, Xu Shan, V. Prasad, Y. M. Ma, S. Han, Z. P. Mao, Krisztian Peters, H. S. Chen, X. H. Sun, H. L. Dai, Igor Boyko, S. S. Sun, X. Y. Jiang, Angelo Rivetti, J. Fang, L. H. Wu, Z. Gao, M. Savrie, Y. G. Xie, Y. C. Zhu, Yi Jin, M. M. Ma, Ch. Rosner, M. Destefanis, J. Q. Zhang, Y. T. Tan, S. L. Niu, W. Gradl, M. Ripka, M. G. Zhao, Y. H. Yang, R. P. Guo, J. Zhu, L. Koch, J. W. Li, A. Khoukaz, X. Liu, G. R. Liao, L. Xia, F. De Mori, Y. J. Xiao, R. Baldini Ferroli, H. Liang, S. X. Du, X. S. Qin, D. Y. Wang, Niu Xiaoyang, J. Min, S. J. Zhao, Meng Wang, Z. X. Meng, X. A. Xiong, Zhiqing Liu, F. Y. Li, X. Q. Li, Y. F. Long, M. Greco, A. A. Zafar, M. Fritsch, B. Kopf, T. Johansson, J. F. Chang, Y. Pan, E. Boger, J. Chai, K. H. Rashid, T. Held, R. E. Mitchell, K. L. He, Jianhao Zhang, Q. J. Xu, Magnus Wolke, J. C. Chen, Xuanhong Lou, G. X. Sun, J. V. Bennett, Y. F. Liang, O. B. Kolcu, X. N. Li, Ke Liu, Y. T. Liang, M. Z. Wang, Haiping Peng, Jimin Zhao, D. P. Jin, Nasser Kalantar-Nayestanaki, S. J. Chen, P. L. Li, C. Morales Morales, Y. Ban, P. Weidenkaff, F. H. Heinsius, X. Cai, Q. M. Ma, L. Lavezzi, A. Mustafa, K. J. Li, X. Q. Hao, Z. Jiao, Fu-Hu Liu, D. H. Zhang, C. Sowa, Y. B. Zhao, Serkant Ali Cetin, Yi Zhang, Y. Yuan, Y. S. Zhu, M. Albrecht, W. D. Li, B. T. Tsednee, J. Dong, J. J. Xu, Z. Q. Yang, Guangshun Huang, L. Yan, Dayong Wang, M. Kuessner, N. Qin, S. P. Wen, S. Nisar, C. J. Tang, Y. Hu, K. Y. Liu, Z. A. Liu, J. S. Huang, C. X. Liu, D. Y. Liu, J. B. Jiao, S. Q. Qu, Z. B. Li, W. Ikegami Andersson, R. Kappert, X. R. Zhou, P. Kiese, Yuan Hou, S. L. Olsen, Cheng Li, R. A. Briere, G. F. Xu, X. S. Jiang, H. J. Lu, J. G. Lu, G. A. Chelkov, F. E. Maas, X. Y. Song, T. Hu, Y. H. Xie, J. Pellegrino, O. Bakina, M. Maggiora, J. L. Zhang, Ling Zhao, M. H. Gu, R. Kiuchi, H. Y. Sheng, Lei Zhao, Z. L. Hou, C. X. Yu, P. X. Shen, B. Zheng, R. G. Ping, Z. Wu, X. K. Chu, M. H. Ye, Y. K. Heng, Zhiqing Zhang, L. D. Liu, L. Y. Dong, J. F. Hu, C. Z. Yuan, N. Cao, F. Nerling, Zhiyong Zhang, I. B. Nikolaev, J. H. Yin, M. Shao, Y. T. Gu, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, X. H. Mo, L. S. Wang, Y. Ding, L. L. Wang, H. Cai, B. J. Liu, W. Kühn, Z. Y. You, Z. A. Zhu, T. Weber, C. P. Shen, L. J. Wu, Y. J. Mo, Liqing Xu, X. Y. Shen, W. Imoehl, X. L. Luo, K. Begzsuren, F. Bianchi, G. Y. Tang, Huanhuan Liu, Y. H. Zheng, Cong-Feng Qiao, Jie Zhao, D. X. Lin, G. Felici, N. Yu. Muchnoi, H. J. Li, Q. L. Xiu, X. S. Kang, Alexey Zhemchugov, H. M. Hu, Zongyuan Wang, Y. H. Zhang, Q. Ouyang, S. S. Fang, Y. B. Liu, Z. Y. Wang, M. Alekseev, I. Uman, P. Larin, T. Y. Qi, Y. X. Xia, S. H. Zhu, and W. G. Li

Subjects
Physics, Crystallography, Annihilation, Amplitude, Branching fraction, Electron–positron annihilation, 0103 physical sciences, General Physics and Astronomy, 010306 general physics, 01 natural sciences, Energy (signal processing), Order of magnitude, Luminosity
Abstract

We present the first amplitude analysis of the decay D_{s}^{+}→π^{+}π^{0}η. We use an e^{+}e^{-} collision data sample corresponding to an integrated luminosity of 3.19 fb^{-1} collected with the BESIII detector at a center-of-mass energy of 4.178 GeV. We observe for the first time the W-annihilation dominant decays D_{s}^{+}→a_{0}(980)^{+}π^{0} and D_{s}^{+}→a_{0}(980)^{0}π^{+}. We measure the absolute branching fraction B(D_{s}^{+}→a_{0}(980)^{+(0)}π^{0^{(}+)},a_{0}(980)^{+(0)}→π^{+(0)}η)=(1.46±0.15_{stat}±0.23_{sys})%, which is larger than the branching fractions of other measured pure W-annihilation decays by at least one order of magnitude. In addition, we measure the branching fraction of D_{s}^{+}→π^{+}π^{0}η with significantly improved precision.

Published
2019
Full Text
View/download PDF

8. Prototype design of readout electronics for In-Beam TOF-PET of Heavy-Ion Cancer Therapy Device

Author

Hong Su, Lingyun Ke, X. Zhang, C. M. Du, Jie Kong, Niu Xiaoyang, Yang Haibo, Yan Junwei, and Jin-Da Chen

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, business.industry, Detector, Resolution (electron density), Iterative reconstruction, 01 natural sciences, Lyso, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, Time of flight, 0302 clinical medicine, Optics, Beamline, 0103 physical sciences, Field-programmable gate array, business, Instrumentation, Energy (signal processing)
Abstract

Heavy-Ion Cancer Therapy Device (HICTD) developed by the Institute of Modern Physics of the Chinese Academy of Sciences is an advanced tumor radiotherapy device for nuclear medicine. The time of flight (TOF) positron emission tomography (PET) located on the beam line, called In-Beam TOF-PET, is a key detector in HICTD, which is employed for obtaining time, energy and position information of gamma ray to implement real-time image reconstruction during the treatment. A high performance readout electronics system has been designed for In-Beam TOF-PET. The Data Acquisition Unit (DAQU), a key device of it has been implemented. The signals from the In-Beam TOF-PET are acquired and processed by the DAQU, including 8 energy chains and 2 time chains. A field programmable gate array (FPGA) is adopted as a processor on board for implementing pulse area information extracting algorithm, FPGA-based TDC, and etc. The precision pulsar test indicates that the DAQU system has intrinsic influences on the energy resolution better than 5.5 ‰ (full width at the half-maximum, FWHM) and time resolution of 255 ps (FWHM). The 22Na source test indicates that the overall system of the in-beam TOF-PET has an energy resolution of 14% FWHM at 511 keV and coincidence timing resolution better than 1.12 ns. The good position identification ability is indicated by the flood map, all the 484 crystals in one of LYSO crystal block detectors can be clearly distinguished.

Published
2020
Full Text
View/download PDF

9. Results of heavy ion beam tests of DAMPE plastic scintillator detector

Author

Jie Kong, Peng Yang, Junling Chen, Yang Haibo, Jie Liu, Zhi-Yu Sun, Wenqiang Liu, Zhao Hongyun, Bitao Hu, Yang Yaqing, Fang Fang, Yong Zhou, Hong Su, Niu Xiaoyang, Yongjie Zhang, Yu-Hong Yu, and Shengxia Zhang

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, Photon, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Detector, Dark matter, Cosmic ray, Electron, Scintillator, 01 natural sciences, Nuclear physics, 0103 physical sciences, 010306 general physics, 010303 astronomy & astrophysics, Instrumentation, Beam (structure)
Abstract

Being the first astronomical scientific satellite of China, Dark Matter Particle Explorer (DAMPE) has been launched on D e c . 17 , 2015 . One of scientific objects of DAMPE is studying the acceleration and propagation mechanisms of cosmic rays by measuring the flux of nuclei cosmic rays up to several hundred T e V s . As one of the key detectors of DAMPE, the Plastics Scintillator Detector (PSD) is used for the nuclei identification as well for the photons/electrons separation. After assembly of DAMPE engineering qualified model (EQM), several beam tests were conducted at CERN to study the performance and the reliability of DAMPE. In this paper, design verification and performance of PSD with heavy ion beam tests will be reported in detail.

Published
2020
Full Text
View/download PDF

10. Design of fast adaptive readout system for wire scanners

Author

Zhao Hongyun, Yang Haibo, Jie Kong, She Qianshun, Zhang Jingzhe, Qian Yi, Junxia Wu, Hong Su, and Niu Xiaoyang

Subjects
Nuclear and High Energy Physics, Accuracy and precision, 010308 nuclear & particles physics, Computer science, business.industry, Gaussian, Measure (physics), Full scale, Injector, 01 natural sciences, law.invention, symbols.namesake, Nonlinear system, Optics, Nuclear Energy and Engineering, law, 0103 physical sciences, symbols, Physics::Accelerator Physics, Thermal emittance, 010306 general physics, business, Beam (structure)
Abstract

A new wide-range fast readout system capable of adaptive identification is designed for wire scanners, which are used to measure beam profiles and emittance. This system is capable of handling varying current signals with Gaussian distributions and current pulses up to 1000 counts/s, as well as an input current range of 1 nA–1 mA. When tested, the resolution was found to exceed 3.68% for full scale, the nonlinearity was found to be less than 0.11%, and the measurement sensibility was found to be less than 5 pA. We believe that the system will play a crucial role in improving the measurement accuracy of beam diagnosis and the efficiency of accelerator operation, as well as decreasing the time required for beam tuning. This system was applied to the beam diagnosis of an injector II prototype for an accelerator-driven subcritical system and produced excellent measurement results. A description of the adaptive fast readout system for wire scanners is presented in this paper.

Published
2017
Full Text
View/download PDF

11. Precise Measurement of the e+e−→π+π−J/ψ Cross Section at Center-of-Mass Energies from 3.77 to 4.60 GeV

Author

Teng Li, B. S. Zou, D. Y. Liu, J. P. Dai, Jianmin Dong, Yong Ban, Y. D. Wang, J. F. Qiu, S. Q. Zhang, C. F. Qiao, Z. Ning, K. Li, K. Zhang, J. Lange, Q. P. Ji, Lei Li, W. X. Gong, Y. J. Mao, G. Cibinetto, F. C. Ma, M. Maggiora, Wei Li, R. G. Ping, J. V. Bennett, T. Holtmann, J. S. Yu, S. S. Fang, Xuejun Wang, Hongji Yang, Kejun Zhu, Q. J. Xu, Zhiyong Zhang, A. Sarantsev, X. H. Sun, Guangshun Huang, L. Yan, Q. Gao, Lei Zhao, Q. An, H. R. Qi, X. C. Lou, Zhen Wang, Yiming Zhang, F. A. Harris, J. Y. Zhang, Yuehong Xie, A. Dbeyssi, J. Min, Z. J. Xiao, M. H. Gu, X. D. Ruan, L. L. Ma, H. Loehner, L. Gong, Ming-Xing Luo, X. N. Ma, A. Zhemchugov, L. S. Wang, Y. T. Liang, Qi Liu, X. D. Chen, Zhiqing Liu, X. L. Ji, Z. B. Li, M. Kavatsyuk, Bibo Ke, Yuekun Heng, E. H. Thorndike, S. P. Wen, C. D. Fu, G. Rong, Wolfgang Kuhn, Serkant Ali Cetin, H. Leithoff, P. F. Duan, H. H. Zhang, Bingxuan Liu, S. Jin, Xingtao Huang, L. Lavezzi, B. L. Wang, M. N. Achasov, Giulietto Felici, Xiaozhong Huang, X. B. Ji, Mingshui Chen, A. Amoroso, W. M. Song, Sai-Juan Chen, S. Pacetti, Y. H. Zheng, Fang Liu, Y. F. Wang, H. Muramatsu, Hao Liang, M. Wolke, Z. Wu, O. B. Kolcu, Jian Zhuang, Y. B. Li, A. Denig, Jin Li, Qun Ouyang, Jian Fang, S. H. Zhu, X. H. Mo, W. P. Wang, Yingchun Zhu, Orhan Cakir, M. Lara, P. Kiese, Siyuan Sun, M. Shao, A. Q. Guo, Andrzej Kupsc, C. Leng, Xu Zhou, H. B. Li, Shou-hua Zhu, M. Tiemens, X. Q. Hao, R. Kliemt, H. J. Li, M. Ye, L. Zotti, L. Zhang, Jiajun Zheng, Y. T. Gu, Zhi Zeng, N. Yu. Muchnoi, H. Cai, D. X. Lin, Y. H. Guan, R. A. Briere, A. Julin, Kai Wang, Y. Xia, F. Y. Li, S. L. Olsen, Z. Liu, B. Zheng, Zheng Wang, Guo-Ming Chen, J. Z. Bai, F. Feldbauer, Shujun Zhao, H. L. Dai, Z. T. Sun, C. P. Shen, Yong Liu, D. Bettoni, D. Y. Wang, Y. Zeng, R. Farinelli, G. F. Xu, Xuan Zhang, Jie Liu, H. Y. Sheng, Wang Zengqiang, Niu Xiaoyang, Z. Jiao, C. L. Luo, Cen Zhang, S. X. Du, Y. P. Lu, Y. N. Zhang, Fabrizio Bianchi, Zhengguo Zhao, Michela Greco, Guangyu Zhao, J. W. Zhao, Jie Zhao, S. Z. Chen, Changjian Tang, S. Ahmed, Y. X. Yang, Jie Zhang, Jia Xu, H. X. Yang, V. Prasad, L. Y. Dong, M. G. Zhao, Xianglei Zhu, R. Baldini Ferroli, F. H. Heinsius, J. F. Chang, X. K. Zhou, Wenbiao Yan, Ming Qi, Xian Gao, P. Wang, S. Marcello, J.H. Yin, G. F. Cao, A. Yuncu, D. M. Li, Haiwen Liu, J. F. Sun, Yongke Zhao, R. Poling, B. Zhong, L. B. Guo, D. H. Wei, E. Fioravanti, Y. G. Xie, Jia-ju Zhang, Yunpeng Lu, X. P. Xu, K. Schoenning, Q. Y. Li, Jiemin Li, T. Luo, Y. Zhang, B. Wang, Y. Z. Sun, Junguang Lu, X. R. Zhou, Cheng Li, Yuanbo Chen, Jingzhou Fan, T. Held, Niklaus Berger, A. Hafner, J. G. Messchendorp, T. Ma, Dmitri Dedovich, Q. L. Xiu, M. Pelizaeus, G. X. Sun, Z. P. Mao, I. Uman, Xiang Li, A. Calcaterra, L. L. Wang, Xiang Zhou, S. B. Liu, B. Kloss, X. S. Qin, Cunming Liu, Y. Guo, G. R. Liao, X. Y. Shen, Jingzhou Zhao, X. W. Tang, B. Kopf, I. B. Nikolaev, Ding-Xiong Wang, Ye-Fei Yuan, B. X. Zhang, M. Bertani, Minglin Ma, S. L. Niu, M. Kornicer, Z. Y. You, J. S. Huang, Hong Ma, R. E. Mitchell, L. Yang, F. F. An, I. Denysenko, Q. A. Malik, Z. Y. Deng, J. Liu, H. H. Liu, M. Fritsch, C. Dong, Y. H. Yan, O. Albayrak, Zhenyu Zhang, B. J. Liu, L. G. Xia, Tiefu Zhao, S. Sosio, H. Y. Zhang, Wu Li, Jianhao Zhang, Tao Hu, Joachim Pettersson, Meng Wang, Jia Liu, M. Destefanis, X. S. Kang, Chang-Zheng Yuan, Y. J. Mo, Cunfeng Feng, D. H. Zhang, G. Mezzadri, W. C. Yan, F. E. Maas, L. Q. Qin, L. Fava, Zhanwen Zhu, Y. F. Liang, X. L. Li, H. S. Chen, M. Ripka, T. Weber, Y. Ding, N. Qin, P. L. Liu, Chen Hu, Z. L. Hou, X. L. Luo, X. K. Chu, H. J. Lu, B. Y. Zhang, C. Morales Morales, Feng Liu, Ling Zhao, O. Bakina, X. S. Jiang, Kanglin He, Zhao-Long Wang, Z. Gao, Ch. Rosner, I. Garzia, Jianyu Zhang, L. H. Wu, P. X. Shen, Ka-Yuet Liu, P. Musiol, L. W. Jiang, C. F. Redmer, C. Schnier, Zhiqing Zhang, W. Gradl, M. Ablikim, Yu Zhang, A. A. Zafar, J. M. Zhang, S. Han, M. Savrie, J. M. Bian, Y.N. Gao, L. Xia, Jianbei Liu, Lei Xu, W. Shan, Dan Bennett, N. Kalantar-Nayestanaki, Jianguo Zhang, Yi Fang, Y. Q. Wang, K. H. Rashid, U. Wiedner, Qingnian Xu, Qiang Zhao, S. Nisar, Y. Hu, Kai Liu, Xin Fang, H. B. Liu, X. L. Kang, D. Xiao, Q. W. Zhao, M. H. Ye, X. Y. Jiang, Yun-Zhi Zhang, P. Weidenkaff, L. D. Liu, P. R. Li, J. L. Ping, Zahra Haddadi, W. J. Zheng, Y. Nefedov, F. Nerling, Y. Pan, J. Chai, X. Z. Cai, R. P. Guo, W. Ikegami Andersson, Tord Johansson, F. De Mori, Fu-Hu Liu, Y. J. Sun, Z. J. Sun, Y. P. Guo, Y. S. Zhu, Y. B. Liu, Gang Li, G. S. Varner, G. A. Chelkov, Z. H. Qin, Talib Hussain, Yanwei Wang, Li Zhou, Z. L. Dou, D. P. Jin, Xiao-Rui Lyu, X. Y. Ma, M. Y. Dong, Qingming Ma, Kai Zhu, Z. L. Huang, J. C. Chen, S. Qian, Xiang Liu, Xiaoyu Li, Jiaheng Zou, Chunxu Yu, T. J. Min, L. J. Wu, P. Larin, Krisztian Peters, J. F. Hu, Y. Ma, S. Spataro, Jianbin Jiao, B. X. Yu, K. Goetzen, I. Boyko, H. P. Peng, H. M. Hu, I. Tapan, W. F. Wang, H. Xiao, E. Boger, Xinying Song, D. J. Ambrose, Xiaocong Ai, X. R. Chen, M. Albrecht, Cui Li, and P. Patteri

Subjects
Nuclear physics, Physics, Cross section (physics), 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, Sigma, Center of mass, 010306 general physics, 01 natural sciences, Resonance (particle physics), Belle experiment, Storage ring
Abstract

The cross section for the process e(+)e(-)-> pi(+) pi(-) J/psi is measured precisely at center-of-mass energies from 3.77 to 4.60 GeV using 9 fb(-1) of data collected with the BESIII detector operating at the BEPCII storage ring. Two resonant structures are observed in a fit to the cross section. The first resonance has a mass of (222.0 +/- 3.1 +/- 1.4) MeV/ c(2) and a width of (44.1 +/- 4.3 +/- 2.0)MeV, while the second one has a mass of (4320.0 +/- 10.4 +/- 7.0)MeV/c(2) and a width of (101.4(- 19.7)(+25.3) +/- 10.2) MeV, where the first errors are statistical and second ones are systematic. The first resonance agrees with the Y(4260) resonance reported by previous experiments. The precision of its resonant parameters is improved significantly. The second resonance is observed in e(+)e(-)-> pi(+) pi(-) J/psi for the first time. The statistical significance of this resonance is estimated to be larger than 7.6 sigma. The mass and width of the second resonance agree with the Y(4360) resonance reported by the BABAR and Belle experiments within errors. Finally, the Y(4008) resonance previously observed by the Belle experiment is not confirmed in the description of the BESIII data.

Published
2017
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results