14 research outputs found
Relativistic coulomb excitation of Cr-54,Cr-56,Cr-58
No full textThe first excited 2(+) states in Cr-54,Cr-56,Cr-58 have been populated by relativistic Coulomb excitation using the FRS-RISING setup at GSI. The Cr ions were produced by fragmentation of a Kr-86 beam on a primary Be target and separated by the FRS. The ion beams impinged on a thick secondary An target at an energy of around 135A MeV. Gamma-rays were observed by the Ge cluster detectors of the RISING setup and stored in coincidence with particle and position signals from a set of tracking detectors. The steps of the analysis and spectra showing the 2(+) -> 0(+) transitions are presented
Measurement of e+ e− → Dbar D cross sections at the ψ(3770) resonance*
No full textChinese Physics C Paper • The following article is OPEN ACCESS Measurement of e+ e− → Dbar D cross sections at the ψ(3770) resonance* M. Ablikim (麦迪娜)1, M. N. Achasov9,71, S. Ahmed14, M. Albrecht4, M. Alekseev60,62, A. Amoroso60,62, F. F. An (安芬芬)1, Q. An (安琪)44,57, Y. Bai (白羽)43, O. Bakina28, R. Baldini Ferroli22, Y. Ban (班勇)36, K. Begzsuren26, D. W. Bennett21, J. V. Bennett5, N. Berger27, M. Bertani22, D. Bettoni24, J. M. Bian (边渐鸣)54, F. Bianchi60,62, E. Boger28,69, I. Boyko28, R. A. Briere5, H. Cai (蔡浩)64, X. Cai (蔡啸)1,44, O. Cakir47, A. Calcaterra22, G. F. Cao (曹国富)1,51, S. A. Cetin48, J. Chai62, J. F. Chang (常劲帆)1,44, W. L. Chang1,51, G. Chelkov28,69,70, G. Chen (陈刚)1, H. S. Chen (陈和生)1,51, J. C. Chen (陈江川)1, M. L. Chen (陈玛丽)1,44, P. L. Chen (陈平亮)58, S. J. Chen (陈申见)34, X. R. Chen (陈旭荣)31, Y. B. Chen (陈元柏)1,44, X. K. Chu (褚新坤)36, G. Cibinetto24, F. Cossio62, H. L. Dai (代洪亮)1,44, J. P. Dai (代建平)39,75, A. Dbeyssi14, D. Dedovich28, Z. Y. Deng (邓子艳)1, A. Denig27, I. Denysenko28, M. Destefanis60,62, F. De Mori60,62, Y. Ding (丁勇)32, C. Dong (董超)35, J. Dong (董静)1,44, L. Y. Dong (董燎原)1,51, M. Y. Dong (董明义)1, Z. L. Dou (豆正磊)34, S. X. Du (杜书先)67, P. F. Duan (段鹏飞)1, J. Fang (方建)1,44, S. S. Fang (房双世)1,51, Y. Fang (方易)1, R. Farinelli24,25, L. Fava61,62, S. Fegan27, F. Feldbauer4, G. Felici22, C. Q. Feng (封常青)44,57, E. Fioravanti24, M. Fritsch4, C. D. Fu (傅成栋)1, Q. Gao (高清)1, X. L. Gao (高鑫磊)44,57, Y. Gao (高原宁)46, Y. G. Gao (高勇贵)6, Z. Gao (高榛)44,57, B. Garillon27, I. Garzia24, A. Gilman54, K. Goetzen10, L. Gong (龚丽)35, W. X. Gong (龚文煊)1,44, W. Gradl27, M. Greco60,62, L. M. Gu (谷立民)34, M. H. Gu (顾旻皓)1,44, Y. T. Gu (顾运厅)12, A. Q. Guo (郭爱强)1, L. B. Guo (郭立波)33, R. P. Guo (郭如盼)1,51, Y. P. Guo (郭玉萍)27, A. Guskov28, Z. Haddadi30, S. Han (韩爽)64, X. Q. Hao (郝喜庆)15, F. A. Harris52, K. L. He (何康林)1,51, X. Q. He (何希勤)56, F. H. Heinsius4, T. Held4, Y. K. Heng (衡月昆)1, T. Holtmann4, Z. L. Hou (侯治龙)1, H. M. Hu (胡海明)1,51, J. F. Hu (胡继峰)39,75, T. Hu (胡涛)1, Y. Hu (胡誉)1, G. S. Huang (黄光顺)44,57, J. S. Huang (黄金书)15, X. T. Huang (黄性涛)38, X. Z. Huang (黄晓忠)34, Z. L. Huang (黄智玲)32, T. Hussain59, W. Ikegami Andersson63, M Irshad44,57, Q. Ji (纪全)1, Q. P. Ji (姬清平)15, X. B. Ji (季晓斌)1,51, X. L. Ji (季筱璐)2, X. S. Jiang (江晓山)1, X. Y. Jiang (蒋兴雨)35, J. B. Jiao (焦健斌)38, Z. Jiao (焦铮)17, D. P. Jin (金大鹏)1, S. Jin (金山)1,51, Y. Jin (金毅)53, T. Johansson63, A. Julin54, N. Kalantar-Nayestanaki30, X. S. Kang (康晓珅)35, M. Kavatsyuk30, B. C. Ke (柯百谦)1, T. Khan44,57, A. Khoukaz55, P. Kiese27, R. Kliemt10, L. Koch29, O. B. Kolcu48,73, B. Kopf4, M. Kornicer52, M. Kuemmel4, M. Kuessner4, A. Kupsc63, M. Kurth1, W. Kuhn29, J. S. Lange29, M. Lara21, P. Larin14, L. Lavezzi62,1, S. Leiber4, H. Leithoff27, C. Li (李翠)63, Cheng Li (李澄)44,57, D. M. Li (李德民)67, F. Li (李飞)1,44, F. Y. Li (李峰云)36, G. Li (李刚)1, H. B. Li (李海波)1,51, H. J. Li (李惠静)1,51, J. C. Li (李家才)1, J. W. Li (李井文)42, K. J. Li (李凯杰)45, Kang Li (李康)13, Ke Li (李科)1, Lei Li (李蕾)3, P. L. Li (李佩莲)44,57, P. R. Li (李培荣)7,51, Q. Y. Li (李启云)38, T. Li (李腾)38, W. D. Li (李卫东)1,51, W. G. Li (李卫国)1, X. L. Li (李晓玲)38, X. N. Li (李小男)1,44, X. Q. Li (李学潜)35, Z. B. Li (李志兵)45, H. Liang (梁昊)44,57, Y. F. Liang (梁勇飞)41, Y. T. Liang (梁羽铁)29, G. R. Liao (廖广睿)11, L. Z. Liao (廖龙洲)1,51, J. Libby20, C. X. Lin (林创新)45, D. X. Lin (林德旭)14, B. Liu (刘冰)39,75, B. J. Liu (刘北江)1, C. X. Liu (刘春秀)1, D. Liu (刘栋)44,57, D. Y. Liu (刘殿宇)39,75, F. H. Liu (刘福虎)40, Fang Liu (刘芳)1, Feng Liu (刘峰)6, H. B. Liu (刘宏邦)12, H. L Liu (刘恒君)43, H. M. Liu (刘怀民)1,51, Huanhuan Liu (刘欢)1, Huihui Liu (刘汇慧)16, J. B. Liu (刘建北)44,57, J. Y. Liu (刘晶译)1,51, K. Liu (刘凯)46, K. Y. Liu (刘魁勇)32, Ke Liu (刘珂)6, L. D. Liu (刘兰雕)36, Q. Liu (刘倩)51, S. B. Liu (刘树彬)44,57, X. Liu (刘翔)31, Y. B. Liu (刘玉斌)35, Z. A. Liu (刘振安)1, Zhiqing Liu (刘智青)27, Y. F. Long (龙云飞)36, X. C. Lou (娄辛犴)1, H. J. Lu (吕海江)17, J. G. Lu (吕军光)1,44, Y. Lu (卢宇)1, Y. P. Lu (卢云鹏)1,44, C. L. Luo (罗成林)33, M. X. Luo (罗民兴)66, X. L. Luo (罗小兰)1,44, S. Lusso62, X. R. Lyu (吕晓睿)51, F. C. Ma (马凤才)32, H. L. Ma (马海龙)1, L. L. Ma (马连良)38, M. M. Ma (马明明)1,51, Q. M. Ma (马秋梅)1, X. N. Ma (马旭宁)35, X. Y. Ma (马骁妍)1,44, Y. M. Ma (马玉明)38, F. E. Maas14, M. Maggiora60,62, Q. A. Malik59, A. Mangoni23, Y. J. Mao (冒亚军)36, Z. P. Mao (毛泽普)1, S. Marcello60,62, Z. X. Meng (孟召霞)53, J. G. Messchendorp30, G. Mezzadri24, J. Min (闵建)1,44, T. J. Min (闵天觉)1, R. E. Mitchell21, X. H. Mo (莫晓虎)1, Y. J. Mo (莫玉俊)6, C. Morales Morales14, G. Morello22, N. Yu. Muchnoi9,71, H. Muramatsu (村松創)54, A. Mustafa4, S. Nakhoul10,74, Y. Nefedov28, F. Nerling10, I. B. Nikolaev9,71, Z. Ning (宁哲)1,44, S. Nisar8, S. L. Niu (牛顺利)1,44, X. Y. Niu (牛讯伊)1,51, S. L. Olsen (馬鵬)37,77, Q. Ouyang (欧阳群)1, S. Pacetti23, Y. Pan (潘越)44,57, M. Papenbrock63, P. Patteri22, M. Pelizaeus4, J. Pellegrino60,62, H. P. Peng (彭海平)44,57, Z. Y. Peng (彭志远)12, K. Peters10,74, J. Pettersson63, J. L. Ping (平加伦)33, R. G. Ping (平荣刚)1,51, A. Pitka4, R. Poling54, V. Prasad44,57, H. R. Qi (漆红荣)2, M. Qi (祁鸣)34, T. Y. Qi (齐天钰)2, S. Qian (钱森)1,44, C. F. Qiao (乔从丰)51, N. Qin (覃拈)64, X. S. Qin4, Z. H. Qin (秦中华)1,44, J. F. Qiu (邱进发)1, K. H. Rashid59,76, C. F. Redmer27, M. Richter4, M. Ripka27, M. Rolo62, G. Rong (荣刚)1,51, Ch. Rosner14, X. D. Ruan (阮向东)12, A. Sarantsev28,72, M. Savrie25, C. Schnier4, K. Schoenning63, W. Shan (单葳)18, X. Y. Shan (单心钰)44,57, M. Shao (邵明)44,57, C. P. Shen (沈成平)2, P. X. Shen (沈培迅)35, X. Y. Shen (沈肖雁)1,51, H. Y. Sheng (盛华义)1, X. Shi (史欣)1,44, J. J. Song (宋娇娇)38, W. M. Song38, X. Y. Song (宋欣颖)1, S. Sosio60,62, C. Sowa4, S. Spataro60,62, G. X. Sun (孙功星)1, J. F. Sun (孙俊峰)15, L. Sun (孙亮)64, S. S. Sun (孙胜森)1,51, X. H. Sun (孙新华)1, Y. J. Sun (孙勇杰)44,57, Y. K Sun (孙艳坤)44,57, Y. Z. Sun (孙永昭)1, Z. J. Sun (孙志嘉)1,44, Z. T. Sun (孙振田)21, Y. T Tan (谭雅星)44,57, C. J. Tang (唐昌建)41, G. Y. Tang (唐光毅)1, X. Tang (唐晓)1, I. Tapan49, M. Tiemens30, D. Toth54, B. Tsednee26, I. Uman50, G. S. Varner52, B. Wang (王斌)1, B. L. Wang (王滨龙)51, C. W. Wang (王成伟)34, D. Wang (王东)36, D. Y. Wang (王大勇)36, Dan Wang (王丹)51, K. Wang (王科)1,44, L. L. Wang (王亮亮)1, L. S. Wang (王灵淑)1, M. Wang (王萌)38, Meng Wang (王蒙)1,51, P. Wang (王平)1, P. L. Wang (王佩良)1, W. P. Wang (王维平)44,57, X. F. Wang (王雄飞)1, Y. Wang (王越)44,57, Y. F. Wang (王贻芳)27, Y. Q. Wang (王亚乾)27, Z. Wang (王铮)1,44, Z. G. Wang (王志刚)1,44, Z. Y. Wang (王至勇)1, Zongyuan Wang (王宗源)1,51, T. Weber4, D. H. Wei (魏代会)11, P. Weidenkaff27, S. P. Wen (文硕频)1, U. Wiedner4, M. Wolke63, L. H. Wu (伍灵慧)1, L. J. Wu (吴连近)1,51, Z. Wu (吴智)1,44, L. Xia (夏磊)44,57, X. Xia38, Y. Xia (夏宇)19, D. Xiao (肖栋)1, Y. J. Xiao (肖言佳)1,51, Z. J. Xiao (肖振军)33, Y. G. Xie (谢宇广)1,44, Y. H. Xie (谢跃红)6, X. A. Xiong (熊习安)1,51, Q. L. Xiu (修青磊)1,44, G. F. Xu (许国发)1, J. J. Xu (徐静静)1,51, L. Xu (徐雷)1, Q. J. Xu (徐庆君)13, Q. N. Xu (徐庆年)51, X. P. Xu (徐新平)42, F. Yan (严芳)58, L. Yan (严亮)60,62, W. B. Yan (鄢文标)44,57, W. C. Yan (闰文成)2, Y. H. Yan (颜永红)19, H. J. Yang (杨海军)39,75, H. X. Yang (杨洪勋)1, L. Yang (杨柳)64, S. L. Yang (杨双莉)1,51, Y. H. Yang (杨友华)34, Y. X. Yang (杨永栩)11, Yifan Yang (杨翊凡)1,51, M. Ye (叶梅)1,44, M. H. Ye (叶铭汉)7, J. H. Yin (殷俊昊)1, Z. Y. You (尤郑昀)45, B. X. Yu (俞伯祥)1, C. X. Yu (喻纯旭)35, J. S. Yu (俞洁晟)31, C. Z. Yuan (苑长征)1,51, Y. Yuan (袁野)1, A. Yuncu48,68, A. A. Zafar59, A. Zallo22, Y. Zeng (曾云)19, Z. Zeng (曾哲)44,57, B. X. Zhang (张丙新)1, B. Y. Zhang (张炳云)1,44, C. C. Zhang (张长春)1, D. H. Zhang (张达华)1, H. H. Zhang (张宏浩)45, H. Y. Zhang (章红宇)1,44, J. Zhang (张晋)1,51, J. L. Zhang (张杰磊)65, J. Q. Zhang4, J. W. Zhang (张家文)1, J. Y. Zhang (张建勇)1, J. Z. Zhang (张景芝)1,51, K. Zhang (张坤)1,51, L. Zhang (张磊)46, S. F. Zhang (张思凡)34, T. J. Zhang (张天骄)39,75, X. Y. Zhang (张学尧)38, Y. Zhang (张言)44,57, Y. H. Zhang (张银鸿)1,44, Y. T. Zhang (张亚腾)44,57, Yang Zhang (张洋)1, Yao Zhang (张瑶)1, Yu Zhang (张宇)51, Z. H. Zhang (张正好)6, Z. P. Zhang (张子平)57, Z. Y. Zhang (张振宇)64, G. Zhao (赵光)1, J. W. Zhao (赵京伟)1,44, J. Y. Zhao (赵静宜)1,51, J. Z. Zhao (赵京周)1,44, Lei Zhao (赵雷)44,57, Ling Zhao (赵玲)1, M. G. Zhao (赵明刚)35, Q. Zhao (赵强)1, S. J. Zhao (赵书俊)67, T. C. Zhao (赵天池)1, Y. B. Zhao (赵豫斌)1,44, Z. G. Zhao (赵政国)44,57, A. Zhemchugov28,69, B. Zheng (郑波)58, J. P. Zheng (郑建平)1,44, W. J. Zheng (郑文静)38, Y. H. Zheng (郑阳恒)51, B. Zhong (钟彬)33, L. Zhou (周莉)1,44, Q. Zhou (周巧)1,51, X. Zhou (周详)64, X. K. Zhou (周晓康)44,57, X. R. Zhou (周小蓉)44,57, X. Y. Zhou (周兴玉)1, A. N. Zhu (朱傲男)1,51, J. Zhu (朱江)35, J. Zhu (朱江)45, K. Zhu (朱凯)1, K. J. Zhu (朱科军)1, S. Zhu (朱帅)1, S. H. Zhu (朱世海)56, X. L. Zhu (朱相雷)46, Y. C. Zhu (朱莹春)44,57, Y. S. Zhu (朱永生)1,51, Z. A. Zhu (朱自安)1,51, J. Zhuang (庄建)1,44, B. S. Zou (邹冰松)1, J. H. Zou (邹佳恒)1 and BESIII CollaborationHide full author list © 2018 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd Chinese Physics C, Volume 42, Number 8 Download Article PDF Figures References Download PDF 523 Total downloads 1 1 citation on Dimensions. Article has an altmetric score of 3 Turn on MathJax Share this article Share this content via email Share on Facebook Share on Twitter Share on Google+ Share on CiteULike Share on Mendeley Hide article information Author affiliations 1 Institute of High Energy Physics, Beijing 100049, China 2 Beihang University, Beijing 100191, China 3 Beijing Institute of Petrochemical Technology, Beijing 102617, China 4 Bochum Ruhr-University, D-44780 Bochum, Germany 5 Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA 6 Central China Normal University, Wuhan 430079, China 7 China Center of Advanced Science and Technology, Beijing 100190, China 8 COMSATS Institute of Information Technology, Lahore, Defence Road, Off Raiwind Road, 54000 Lahore, Pakistan 9 G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia 10 GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany 11 Guangxi Normal University, Guilin 541004, China 12 Guangxi University, Nanning 530004, China 13 Hangzhou Normal University, Hangzhou 310036, China 14 Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany 15 Henan Normal University, Xinxiang 453007, China 16 Henan University of Science and Technology, Luoyang 471003, China 17 Huangshan College, Huangshan 245000, China 18 Hunan Normal University, Changsha 410081, China 19 Hunan University, Changsha 410082, China 20 Indian Institute of Technology Madras, Chennai 600036, India 21 Indiana University, Bloomington, Indiana 47405, USA 22 INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy 23 INFN and University of Perugia, I-06100, Perugia, Italy 24 INFN Sezione di Ferrara, I-44122, Ferrara, Italy 25 University of Ferrara, I-44122, Ferrara, Italy 26 Institute of Physics and Technology, Peace Ave. 54B, Ulaanbaatar 13330, Mongolia 27 Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany 28 Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia 29 Justus-Liebig-Universitaet Giessen, II. Physikalisches Institut, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany 30 KVI-CART, University of Groningen, NL-9747 AA Groningen, The Netherlands 31 Lanzhou University, Lanzhou 730000, China 32 Liaoning University, Shenyang 110036, China 33 Nanjing Normal University, Nanjing 210023, China 34 Nanjing University, Nanjing 210093, China 35 Nankai University, Tianjin 300071, China 36 Peking University, Beijing 100871, China 37 Seoul National University, Seoul, 151-747, Korea 38 Shandong University, Jinan 250100, China 39 Shanghai Jiao Tong University, Shanghai 200240, China 40 Shanxi University, Taiyuan 030006, China 41 Sichuan University, Chengdu 610064, China 42 Soochow University, Suzhou 215006, China 43 Southeast University, Nanjing 211100, China 44 State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, China 45 Sun Yat-Sen University, Guangzhou 510275, China 46 Tsinghua University, Beijing 100084, China 47 Ankara University, 06100 Tandogan, Ankara, Turkey 48 Istanbul Bilgi University, 34060 Eyup, Istanbul, Turkey 49 Uludag University, 16059 Bursa, Turkey 50 Near East University, Nicosia, North Cyprus, Mersin 10, Turkey 51 University of Chinese Academy of Sciences, Beijing 100049, China 52 University of Hawaii, Honolulu, Hawaii 96822, USA 53 University of Jinan, Jinan 250022, China 54 University of Minnesota, Minneapolis, Minnesota 55455, USA 55 University of Muenster, Wilhelm-Klemm-Str. 9, 48149 Muenster, Germany 56 University of Science and Technology Liaoning, Anshan 114051, China 57 University of Science and Technology of China, Hefei 230026, China 58 University of South China, Hengyang 421001, China 59 University of the Punjab, Lahore-54590, Pakistan 60 University of Turin, I-10125, Turin, Italy 61 University of Eastern Piedmont, I-15121, Alessandria, Italy 62 INFN, I-10125, Turin, Italy 63 Uppsala University, Box 516, SE-75120 Uppsala, Sweden 64 Wuhan University, Wuhan 430072, China 65 Xinyang Normal University, Xinyang 464000, China 66 Zhejiang University, Hangzhou 310027, China 67 Zhengzhou University, Zhengzhou 450001, China 68 Also at Bogazici University, 34342 Istanbul, Turkey 69 Also at the Moscow Institute of Physics and Technology, Moscow 141700, Russia 70 Also at the Functional Electronics Laboratory, Tomsk State University, Tomsk, 634050, Russia 71 Also at the Novosibirsk State University, Novosibirsk, 630090, Russia 72 Also at the NRC "Kurchatov Institute", PNPI, 188300, Gatchina, Russia 73 Also at Istanbul Arel University, 34295 Istanbul, Turkey 74 Also at Goethe University Frankfurt, 60323 Frankfurt am Main, Germany 75 Also at Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education; Shanghai Key Laboratory for Particle Physics and Cosmology; Institute of Nuclear and Particle Physics, Shanghai 200240, China 76 Also at Government College Women University, Sialkot - 51310. Punjab, Pakistan 77 Currently at: Center for Underground Physics, Institute for Basic Science, Daejeon 34126, Korea Dates Received 17 March 2018 Citation M. Ablikim et al 2018 Chinese Phys. C 42 083001 Create citation alert DOI https://doi.org/10.1088/1674-1137/42/8/083001 E-print http://arxiv.org/abs/1803.06293 Journal RSS feed Sign up for new issue notifications Abstract We report new measurements of the cross sections for the production of Dbar D final states at the ψ(3770) resonance. Our data sample consists of an integrated luminosity of 2.93 fb−1 of e+e− annihilation data produced by the BEPCII collider and collected and analyzed with the BESIII detector. We exclusively reconstruct three D0 and six D+ hadronic decay modes and use the ratio of the yield of fully reconstructed Dbar D events ("double tags") to the yield of all reconstructed D or bar D mesons ("single tags") to determine the number of D0bar D0 and D+D− events, benefiting from the cancellation of many systematic uncertainties. Combining these yields with an independent determination of the integrated luminosity of the data sample, we find the cross sections to be σ(e+e− → D0bar D0) nb and σ(e+e− → D+D−) = (2.830 ± 0.011 ± 0.026) nb, where the uncertainties are statistical and systematic, respectively. Chinese Physics C Paper • The following article is OPEN ACCESS Measurement of e+ e− → Dbar D cross sections at the ψ(3770) resonance* M. Ablikim (麦迪娜)1, M. N. Achasov9,71, S. Ahmed14, M. Albrecht4, M. Alekseev60,62, A. Amoroso60,62, F. F. An (安芬芬)1, Q. An (安琪)44,57, Y. Bai (白羽)43, O. Bakina28, R. Baldini Ferroli22, Y. Ban (班勇)36, K. Begzsuren26, D. W. Bennett21, J. V. Bennett5, N. Berger27, M. Bertani22, D. Bettoni24, J. M. Bian (边渐鸣)54, F. Bianchi60,62, E. Boger28,69, I. Boyko28, R. A. Briere5, H. Cai (蔡浩)64, X. Cai (蔡啸)1,44, O. Cakir47, A. Calcaterra22, G. F. Cao (曹国富)1,51, S. A. Cetin48, J. Chai62, J. F. Chang (常劲帆)1,44, W. L. Chang1,51, G. Chelkov28,69,70, G. Chen (陈刚)1, H. S. Chen (陈和生)1,51, J. C. Chen (陈江川)1, M. L. Chen (陈玛丽)1,44, P. L. Chen (陈平亮)58, S. J. Chen (陈申见)34, X. R. Chen (陈旭荣)31, Y. B. Chen (陈元柏)1,44, X. K. Chu (褚新坤)36, G. Cibinetto24, F. Cossio62, H. L. Dai (代洪亮)1,44, J. P. Dai (代建平)39,75, A. Dbeyssi14, D. Dedovich28, Z. Y. Deng (邓子艳)1, A. Denig27, I. Denysenko28, M. Destefanis60,62, F. De Mori60,62, Y. Ding (丁勇)32, C. Dong (董超)35, J. Dong (董静)1,44, L. Y. Dong (董燎原)1,51, M. Y. Dong (董明义)1, Z. L. Dou (豆正磊)34, S. X. Du (杜书先)67, P. F. Duan (段鹏飞)1, J. Fang (方建)1,44, S. S. Fang (房双世)1,51, Y. Fang (方易)1, R. Farinelli24,25, L. Fava61,62, S. Fegan27, F. Feldbauer4, G. Felici22, C. Q. Feng (封常青)44,57, E. Fioravanti24, M. Fritsch4, C. D. Fu (傅成栋)1, Q. Gao (高清)1, X. L. Gao (高鑫磊)44,57, Y. Gao (高原宁)46, Y. G. Gao (高勇贵)6, Z. Gao (高榛)44,57, B. Garillon27, I. Garzia24, A. Gilman54, K. Goetzen10, L. Gong (龚丽)35, W. X. Gong (龚文煊)1,44, W. Gradl27, M. Greco60,62, L. M. Gu (谷立民)34, M. H. Gu (顾旻皓)1,44, Y. T. Gu (顾运厅)12, A. Q. Guo (郭爱强)1, L. B. Guo (郭立波)33, R. P. Guo (郭如盼)1,51, Y. P. Guo (郭玉萍)27, A. Guskov28, Z. Haddadi30, S. Han (韩爽)64, X. Q. Hao (郝喜庆)15, F. A. Harris52, K. L. He (何康林)1,51, X. Q. He (何希勤)56, F. H. Heinsius4, T. Held4, Y. K. Heng (衡月昆)1, T. Holtmann4, Z. L. Hou (侯治龙)1, H. M. Hu (胡海明)1,51, J. F. Hu (胡继峰)39,75, T. Hu (胡涛)1, Y. Hu (胡誉)1, G. S. Huang (黄光顺)44,57, J. S. Huang (黄金书)15, X. T. Huang (黄性涛)38, X. Z. Huang (黄晓忠)34, Z. L. Huang (黄智玲)32, T. Hussain59, W. Ikegami Andersson63, M Irshad44,57, Q. Ji (纪全)1, Q. P. Ji (姬清平)15, X. B. Ji (季晓斌)1,51, X. L. Ji (季筱璐)2, X. S. Jiang (江晓山)1, X. Y. Jiang (蒋兴雨)35, J. B. Jiao (焦健斌)38, Z. Jiao (焦铮)17, D. P. Jin (金大鹏)1, S. Jin (金山)1,51, Y. Jin (金毅)53, T. Johansson63, A. Julin54, N. Kalantar-Nayestanaki30, X. S. Kang (康晓珅)35, M. Kavatsyuk30, B. C. Ke (柯百谦)1, T. Khan44,57, A. Khoukaz55, P. Kiese27, R. Kliemt10, L. Koch29, O. B. Kolcu48,73, B. Kopf4, M. Kornicer52, M. Kuemmel4, M. Kuessner4, A. Kupsc63, M. Kurth1, W. Kuhn29, J. S. Lange29, M. Lara21, P. Larin14, L. Lavezzi62,1, S. Leiber4, H. Leithoff27, C. Li (李翠)63, Cheng Li (李澄)44,57, D. M. Li (李德民)67, F. Li (李飞)1,44, F. Y. Li (李峰云)36, G. Li (李刚)1, H. B. Li (李海波)1,51, H. J. Li (李惠静)1,51, J. C. Li (李家才)1, J. W. Li (李井文)42, K. J. Li (李凯杰)45, Kang Li (李康)13, Ke Li (李科)1, Lei Li (李蕾)3, P. L. Li (李佩莲)44,57, P. R. Li (李培荣)7,51, Q. Y. Li (李启云)38, T. Li (李腾)38, W. D. Li (李卫东)1,51, W. G. Li (李卫国)1, X. L. Li (李晓玲)38, X. N. Li (李小男)1,44, X. Q. Li (李学潜)35, Z. B. Li (李志兵)45, H. Liang (梁昊)44,57, Y. F. Liang (梁勇飞)41, Y. T. Liang (梁羽铁)29, G. R. Liao (廖广睿)11, L. Z. Liao (廖龙洲)1,51, J. Libby20, C. X. Lin (林创新)45, D. X. Lin (林德旭)14, B. Liu (刘冰)39,75, B. J. Liu (刘北江)1, C. X. Liu (刘春秀)1, D. Liu (刘栋)44,57, D. Y. Liu (刘殿宇)39,75, F. H. Liu (刘福虎)40, Fang Liu (刘芳)1, Feng Liu (刘峰)6, H. B. Liu (刘宏邦)12, H. L Liu (刘恒君)43, H. M. Liu (刘怀民)1,51, Huanhuan Liu (刘欢)1, Huihui Liu (刘汇慧)16, J. B. Liu (刘建北)44,57, J. Y. Liu (刘晶译)1,51, K. Liu (刘凯)46, K. Y. Liu (刘魁勇)32, Ke Liu (刘珂)6, L. D. Liu (刘兰雕)36, Q. Liu (刘倩)51, S. B. Liu (刘树彬)44,57, X. Liu (刘翔)31, Y. B. Liu (刘玉斌)35, Z. A. Liu (刘振安)1, Zhiqing Liu (刘智青)27, Y. F. Long (龙云飞)36, X. C. Lou (娄辛犴)1, H. J. Lu (吕海江)17, J. G. Lu (吕军光)1,44, Y. Lu (卢宇)1, Y. P. Lu (卢云鹏)1,44, C. L. Luo (罗成林)33, M. X. Luo (罗民兴)66, X. L. Luo (罗小兰)1,44, S. Lusso62, X. R. Lyu (吕晓睿)51, F. C. Ma (马凤才)32, H. L. Ma (马海龙)1, L. L. Ma (马连良)38, M. M. Ma (马明明)1,51, Q. M. Ma (马秋梅)1, X. N. Ma (马旭宁)35, X. Y. Ma (马骁妍)1,44, Y. M. Ma (马玉明)38, F. E. Maas14, M. Maggiora60,62, Q. A. Malik59, A. Mangoni23, Y. J. Mao (冒亚军)36, Z. P. Mao (毛泽普)1, S. Marcello60,62, Z. X. Meng (孟召霞)53, J. G. Messchendorp30, G. Mezzadri24, J. Min (闵建)1,44, T. J. Min (闵天觉)1, R. E. Mitchell21, X. H. Mo (莫晓虎)1, Y. J. Mo (莫玉俊)6, C. Morales Morales14, G. Morello22, N. Yu. Muchnoi9,71, H. Muramatsu (村松創)54, A. Mustafa4, S. Nakhoul10,74, Y. Nefedov28, F. Nerling10, I. B. Nikolaev9,71, Z. Ning (宁哲)1,44, S. Nisar8, S. L. Niu (牛顺利)1,44, X. Y. Niu (牛讯伊)1,51, S. L. Olsen (馬鵬)37,77, Q. Ouyang (欧阳群)1, S. Pacetti23, Y. Pan (潘越)44,57, M. Papenbrock63, P. Patteri22, M. Pelizaeus4, J. Pellegrino60,62, H. P. Peng (彭海平)44,57, Z. Y. Peng (彭志远)12, K. Peters10,74, J. Pettersson63, J. L. Ping (平加伦)33, R. G. Ping (平荣刚)1,51, A. Pitka4, R. Poling54, V. Prasad44,57, H. R. Qi (漆红荣)2, M. Qi (祁鸣)34, T. Y. Qi (齐天钰)2, S. Qian (钱森)1,44, C. F. Qiao (乔从丰)51, N. Qin (覃拈)64, X. S. Qin4, Z. H. Qin (秦中华)1,44, J. F. Qiu (邱进发)1, K. H. Rashid59,76, C. F. Redmer27, M. Richter4, M. Ripka27, M. Rolo62, G. Rong (荣刚)1,51, Ch. Rosner14, X. D. Ruan (阮向东)12, A. Sarantsev28,72, M. Savrie25, C. Schnier4, K. Schoenning63, W. Shan (单葳)18, X. Y. Shan (单心钰)44,57, M. Shao (邵明)44,57, C. P. Shen (沈成平)2, P. X. Shen (沈培迅)35, X. Y. Shen (沈肖雁)1,51, H. Y. Sheng (盛华义)1, X. Shi (史欣)1,44, J. J. Song (宋娇娇)38, W. M. Song38, X. Y. Song (宋欣颖)1, S. Sosio60,62, C. Sowa4, S. Spataro60,62, G. X. Sun (孙功星)1, J. F. Sun (孙俊峰)15, L. Sun (孙亮)64, S. S. Sun (孙胜森)1,51, X. H. Sun (孙新华)1, Y. J. Sun (孙勇杰)44,57, Y. K Sun (孙艳坤)44,57, Y. Z. Sun (孙永昭)1, Z. J. Sun (孙志嘉)1,44, Z. T. Sun (孙振田)21, Y. T Tan (谭雅星)44,57, C. J. Tang (唐昌建)41, G. Y. Tang (唐光毅)1, X. Tang (唐晓)1, I. Tapan49, M. Tiemens30, D. Toth54, B. Tsednee26, I. Uman50, G. S. Varner52, B. Wang (王斌)1, B. L. Wang (王滨龙)51, C. W. Wang (王成伟)34, D. Wang (王东)36, D. Y. Wang (王大勇)36, Dan Wang (王丹)51, K. Wang (王科)1,44, L. L. Wang (王亮亮)1, L. S. Wang (王灵淑)1, M. Wang (王萌)38, Meng Wang (王蒙)1,51, P. Wang (王平)1, P. L. Wang (王佩良)1, W. P. Wang (王维平)44,57, X. F. Wang (王雄飞)1, Y. Wang (王越)44,57, Y. F. Wang (王贻芳)27, Y. Q. Wang (王亚乾)27, Z. Wang (王铮)1,44, Z. G. Wang (王志刚)1,44, Z. Y. Wang (王至勇)1, Zongyuan Wang (王宗源)1,51, T. Weber4, D. H. Wei (魏代会)11, P. Weidenkaff27, S. P. Wen (文硕频)1, U. Wiedner4, M. Wolke63, L. H. Wu (伍灵慧)1, L. J. Wu (吴连近)1,51, Z. Wu (吴智)1,44, L. Xia (夏磊)44,57, X. Xia38, Y. Xia (夏宇)19, D. Xiao (肖栋)1, Y. J. Xiao (肖言佳)1,51, Z. J. Xiao (肖振军)33, Y. G. Xie (谢宇广)1,44, Y. H. Xie (谢跃红)6, X. A. Xiong (熊习安)1,51, Q. L. Xiu (修青磊)1,44, G. F. Xu (许国发)1, J. J. Xu (徐静静)1,51, L. Xu (徐雷)1, Q. J. Xu (徐庆君)13, Q. N. Xu (徐庆年)51, X. P. Xu (徐新平)42, F. Yan (严芳)58, L. Yan (严亮)60,62, W. B. Yan (鄢文标)44,57, W. C. Yan (闰文成)2, Y. H. Yan (颜永红)19, H. J. Yang (杨海军)39,75, H. X. Yang (杨洪勋)1, L. Yang (杨柳)64, S. L. Yang (杨双莉)1,51, Y. H. Yang (杨友华)
Measurement of e+e- → Λ Λ ¯ η from 3.5106 to 4.6988 GeV and study of Λ Λ ¯ mass threshold enhancement
No full textUsing data samples with a total integrated luminosity of approximately 18 fb-1 collected by the BESIII detector operating at the Beijing Electron-Positron Collider II, the process e+e-→ΛΛ¯η is studied at center-of-mass energies between 3.5106 and 4.6988 GeV. The Born cross section for the process e+e-→ΛΛ¯η is measured. No significant structure is observed in the Born cross section line shape. An enhancement near the ΛΛ¯ mass threshold is observed for the first time in the process. The structure can be described by an S-wave Breit-Wigner function. Neglecting contribution of excited Λ states and potential interferences, the mass and width are determined to be (2356±7±15) MeV/c2 and (304±28±54) MeV, respectively, where the first uncertainties are statistical and the second are systematic
Relativistic Coulomb excitation of neutron-rich Cr-54,Cr-56,Cr-58: On the pathway of magicity from N=40 to N=32
No full textRelativistic Coulomb excitation of neutron-rich : On the pathway of magicity from to N=40 to N=32
No full textThe first excited 2
+
states in
54,56,58
Cr were populated by Coulomb excitation at relativistic energies and
γ
rays were
measured using the RISING setup at GSI. For
56
Cr and
58
Cr the
B(
E2
,
2
+
1
→
0
+
)
values relative to the previously known
B(
E2
)
value for
54
Cr are determined as 8.7(3.0) and 14.8(4.2) W.u., respectively. The results are consistent with a subshell
closure at neutron number
N
=
32 which was already indicated by the higher energy of the 2
+
1
state in
56
Cr. Recent large-scale
shell model calculations using effective interactions reproduce the trend in the excitation energies, but fail to account for the
minimum in the
B(
E2
)
values at
N
=
32.
2005 Elsevier B.V. All rights reservedsponsorship: The authors wish to thank the technical staff at
GSI for providing the Cr beams. The work was sup-
ported by the German BMBF under grant Nos. 06BN-
109, 06OK-167 and by the Polish State Commit-
tee for Scientific Research (KBN grant No. 620/E-
77/SPB/GSI/P-03/DWM105/2004-2007)status: Publishe
Measurement of e+e−→ΛΛ ̄η from 3.5106 to 4.6988 GeV and study of ΛΛ ̄ mass threshold enhancement
No full textUsing data samples with a total integrated luminosity of approximately 18 fb−1 collected by the BESIII detector operating at the Beijing Electron-Positron Collider II, the process e+e− →ΛΛ ̄η is studied at center-of-mass energies between 3.5106 and 4.6988 GeV. The Born cross section for the process e+e− → ΛΛ ̄η is measured. No significant structure is observed in the Born cross section line shape. An enhancement near the ΛΛ ̄ mass threshold is observed for the first time in the process. The structure can be described by an S-wave Breit-Wigner function. Neglecting contribution of excited Λ states and potential interferences, the mass and width are determined to be (2356 pm 7 pm 15) MeV/c2 and (304 pm 28 pm 54) MeV, respectively, where the first uncertainties are statistical and the second are systemati
The prototype detection unit of the KM3NeT detector
No full textSubmitted to EPJ CInternational audienceA prototype detection unit of the KM3NeT deep-sea neutrino telescope has been installed at 3500m depth 80km offshore the Italian coast. KM3NeT in its final configuration will contain several hundreds of detection units. Each detection unit is a mechanical structure anchored to the sea floor, held vertical by a submerged buoy and supporting optical modules for the detection of Cherenkov light emitted by charged secondary particles emerging from neutrino interactions. This prototype string implements three optical modules with 31 photomultiplier tubes each. These optical modules were developed by the KM3NeT Collaboration to enhance the detection capability of neutrino interactions. The prototype detection unit was operated since its deployment in May 2014 until its decommissioning in July 2015. Reconstruction of the particle trajectories from the data requires a nanosecond accuracy in the time calibration. A procedure for relative time calibration of the photomultiplier tubes contained in each optical module is described. This procedure is based on the measured coincidences produced in the sea by the 40K background light and can easily be expanded to a detector with several thousands of optical modules. The time offsets between the different optical modules are obtained using LED nanobeacons mounted inside them. A set of data corresponding to 600 hours of livetime was analysed. The results show good agreement with Monte Carlo simulations of the expected optical background and the signal from atmospheric muons. An almost background-free sample of muons was selected by filtering the time correlated signals on all the three optical modules. The zenith angle of the selected muons was reconstructed with a precision of about 3{\deg}
Extracting the femtometer structure of strange baryons using the vacuum polarization effect
No full textOne of the fundamental goals of particle physics is to gain a microscopic understanding of the strong interaction. Electromagnetic form factors quantify the structure of hadrons in terms of charge and magnetization distributions. While the nucleon structure has been investigated extensively, data on hyperons are still scarce. It has recently been demonstrated that electron-positron annihilations into hyperon-antihyperon pairs provide a powerful tool to investigate their inner structure. We present a method useful for hyperon-antihyperon pairs of different types which exploits the cross section enhancement due to the effect of vacuum polarization at the J/ψ resonance. Using the 10 billion J/ψ events collected with the BESIII detector, this allows a precise determination of the hyperon structure function. The result is essentially a precise snapshot of the Λ ̄Σ0(ΛΣ ̄0) transition process, encoded in the transition form factor ratio and phase. Their values are measured to be R = 0.860 ± 0.029(stat.) ± 0.015(syst.), ΔΦΛ ̄Σ0=(1.011±0.094(stat.)±0.010(syst.))rad and ΔΦΛΣ ̄0=(2.128±0.094(stat.)±0.010(syst.))rad . Furthermore, charge-parity (CP) breaking is investigated in this reaction and found to be consistent with CP symmetry
