Measurements of weak decay asymmetries of Λc+→pKs0, Λπ+, Σ+π0, and Σ0π+

作     者：M. Ablikim M. N. Achasov P. Adlarson S. Ahmed M. Albrecht M. Alekseev A. Amoroso F. F. An Q. An Y. Bai O. Bakina R. Baldini Ferroli Y. Ban K. Begzsuren J. V. Bennett N. Berger M. Bertani D. Bettoni F. Bianchi J. Biernat J. Bloms I. Boyko R. A. Briere H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin J. Chai J. F. Chang W. L. Chang G. Chelkov D. Y. Chen G. Chen H. S. Chen J. C. Chen M. L. Chen S. J. Chen Y. B. Chen W. Cheng G. Cibinetto F. Cossio X. F. Cui H. L. Dai J. P. Dai X. C. Dai A. Dbeyssi D. Dedovich Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori Y. Ding C. Dong J. Dong L. Y. Dong M. Y. Dong Z. L. Dou S. X. Du J. Z. Fan J. Fang S. S. Fang Y. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng M. Fritsch C. D. Fu Y. Fu Q. Gao X. L. Gao Y. Gao Y. G. Gao Z. Gao B. Garillon I. Garzia E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl M. Greco L. M. Gu M. H. Gu S. Gu Gu Y. T. Gu A. Q. Guo L. B. Guo R. P. Guo Y. P. Guo A. Guskov S. Han X. Q. Hao F. A. Harris K. L. He F. H. Heinsius T. Held Y. K. Heng Y. R. Hou Z. L. Hou H. M. Hu J. F. Hu T. Hu Y. Hu G. S. Huang J. S. Huang X. T. Huang X. Z. Huang Z. L. Huang N. Huesken T. Hussain W. Ikegami Andersson W. Imoehl M. Irshad Q. Ji Q. P. Ji X. B. Ji X. L. Ji H. L. Jiang X. S. Jiang X. Y. Jiang J. B. Jiao Z. Jiao D. P. Jin S. Jin Y. Jin T. Johansson N. Kalantar-Nayestanaki X. S. Kang R. Kappert M. Kavatsyuk B. C. Ke I. K. Keshk T. Khan A. Khoukaz P. Kiese R. Kiuchi R. Kliemt L. Koch O. B. Kolcu B. Kopf M. Kuemmel M. Kuessner A. Kupsc M. Kurth M. G. Kurth W. Kühn J. S. Lange P. Larin L. Lavezzi H. Leithoff T. Lenz C. Li Cheng Li D. M. Li F. Li F. Y. Li G. Li H. B. Li H. J. Li J. C. Li J. W. Li Ke Li L. K. Li Lei Li P. L. Li P. R. Li Q. Y. Li W. D. Li W. G. Li X. H. Li X. L. Li X. N. Li X. Q. Li Z. B. Li Z. Y. Li H. Liang Y. F. Liang Y. T. Liang G. R. Liao L. Z. Liao J. Libby C. X. Lin D. X. Lin Y. J. Lin 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. Y. Liu Ke Liu Q. Liu S. B. Liu T. Liu X. Liu X. Y. Liu Y. B. Liu Z. A. Liu Zhiqing Liu Y. F. Long X. C. Lou H. J. Lu J. D. Lu J. G. Lu Y. Lu Y. P. Lu C. L. Luo M. X. Luo P. W. Luo T. Luo X. L. Luo S. Lusso X. R. Lyu F. C. Ma H. L. Ma L. L. Ma M. M. Ma Q. M. Ma X. N. Ma X. X. Ma X. Y. Ma Y. M. Ma F. E. Maas M. Maggiora S. Maldaner S. Malde Q. A. Malik A. Mangoni Y. J. Mao Z. P. Mao S. Marcello Z. X. Meng J. G. Messchendorp G. Mezzadri J. Min T. J. Min R. E. Mitchell X. H. Mo Y. J. Mo C. Morales Morales N. Yu. Muchnoi H. Muramatsu A. Mustafa S. Nakhoul Y. Nefedov F. Nerling I. B. Nikolaev Z. Ning S. Nisar S. L. Niu S. L. Olsen Q. Ouyang S. Pacetti Y. Pan M. Papenbrock P. Patteri M. Pelizaeus H. P. Peng K. Peters J. Pettersson J. L. Ping R. G. Ping A. Pitka R. Poling V. Prasad M. Qi T. Y. Qi S. Qian C. F. Qiao N. Qin X. P. Qin X. S. Qin Z. H. Qin J. F. Qiu S. Q. Qu K. H. Rashid C. F. Redmer M. Richter M. Ripka A. Rivetti V. Rodin M. Rolo G. Rong Ch. Rosner M. Rump A. Sarantsev M. Savrié K. Schoenning W. Shan X. Y. Shan M. Shao C. P. Shen P. X. Shen X. Y. Shen H. Y. Sheng X. Shi X. D. Shi J. J. Song Q. Q. Song X. Y. Song S. Sosio C. Sowa S. Spataro F. F. Sui G. X. Sun J. F. Sun L. Sun S. S. Sun X. H. Sun Y. J. Sun Y. K. Sun Y. Z. Sun Z. J. Sun Z. T. Sun Y. T. Tan C. J. Tang G. Y. Tang X. Tang V. Thoren B. Tsednee I. Uman B. Wang B. L. Wang C. W. Wang D. Y. Wang H. H. Wang K. Wang L. L. Wang L. S. Wang M. Wang M. Z. Wang Meng Wang P. L. Wang R. M. Wang W. P. Wang X. Wang X. F. Wang X. L. Wang Y. Wang Y. F. Wang Z. Wang Z. G. Wang Z. Y. Wang Zongyuan Wang T. Weber D. H. Wei P. Weidenkaff H. W. Wen S. P. Wen U. Wiedner G. Wilkinson M. Wolke L. H. Wu L. J. Wu Z. Wu L. Xia Y. Xia S. Y. Xiao Y. J. Xiao Z. J. Xiao Y. G. Xie Y. H. Xie T. Y. Xing X. A. Xiong Q. L. Xiu G. F. Xu L. Xu Q. J. Xu W. Xu X. P. Xu F. Yan L. Yan W. B. Yan W. C. Yan Y. H. Yan H. J. Yang H. X. Yang L. Yang R. X. Yang S. L. Yang Y. H. Yang Y. X. Yang Yifan Yang Z. Q. Yang M. Ye M. H. Ye J. H. Yin Z. Y. You B. X. Yu C. X. Yu J. S. Yu C. Z. Yuan X. Q. Yuan Y. Yuan A. Yuncu A. A. Zafar Y. Zeng B. X. Zhang B. Y. Zhang C. C. Zhang D. H. Zhang H. H. Zhang H. Y. Zhang J. Zhang J. L. Zhang J. Q. Zhang J. W. Zhang J. Y. Zhang J. Z. Zhang K. Zhang L. Zhang S. F. Zhang T. J. Zhang X. Y. Zhang Y. Zhang Y. H. Zhang Y. T. Zhang Yang Zhang Yao Zhang Yi Zhang Yu Zhang Z. H. Zhang Z. P. Zhang Z. Y. Zhang G. Zhao J. W. Zhao J. Y. Zhao J. Z. Zhao Lei Zhao Ling Zhao M. G. Zhao Q. Zhao S. J. Zhao T. C. Zhao Y. B. Zhao Z. G. Zhao A. Zhemchugov B. Zheng J. P. Zheng Y. Zheng Y. H. Zheng B. Zhong L. Zhou L. P. Zhou Q. Zhou X. Zhou X. K. Zhou X. R. Zhou Xiaoyu Zhou Xu Zhou A. N. Zhu J. Zhu K. Zhu K. J. Zhu S. H. Zhu W. J. Zhu X. L. Zhu Y. C. Zhu Y. S. Zhu Z. A. Zhu J. Zhuang B. S. Zou J. H. Zou 

作者机构：Institute of High Energy Physics Beijing 100049 People’s Republic of China G.I. Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russia Uppsala University Box 516 SE-75120 Uppsala Sweden Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany Bochum Ruhr-University D-44780 Bochum Germany University of Turin I-10125 Turin Italy INFN I-10125 Turin Italy University of Science and Technology of China Hefei 230026 People’s Republic of China State Key Laboratory of Particle Detection and Electronics Beijing 100049 Hefei 230026 People’s Republic of China Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research 141980 Dubna Moscow region Russia INFN Laboratori Nazionali di Frascati I-00044 Frascati Italy Peking University Beijing 100871 People’s Republic of China Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany INFN Sezione di Ferrara I-44122 Ferrara Italy University of Muenster Wilhelm-Klemm-Str. 9 48149 Muenster Germany Wuhan University Wuhan 430072 People’s Republic of China University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China Istanbul Bilgi University 34060 Eyup Istanbul Turkey Central China Normal University Wuhan 430079 People’s Republic of China Nanjing University Nanjing 210093 People’s Republic of China Nankai University Tianjin 300071 People’s Republic of China Shanghai Jiao Tong University Shanghai 200240 People’s Republic of China Liaoning University Shenyang 110036 People’s Republic of China Zhengzhou University Zhengzhou 450001 People’s Republic of China Tsinghua University Beijing 100084 People’s Republic of China University of Ferrara I-44122 Ferrara Italy University of Eastern Piedmont I-15121 Alessandria Italy University of Manchester Oxford Road Manchester M13 9PL United Kingdom University of Minnesota Minneapolis Minnesota 55455 USA GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 Darmstadt Germany Beihang University Beijing 100191 People’s Republic of China Guangxi University Nanning 530004 People’s Republic of China Indiana University Bloomington Indiana 47405 USA Nanjing Normal University Nanjing 210023 People’s Republic of China Henan Normal University Xinxiang 453007 People’s Republic of China University of Hawaii Honolulu Hawaii 96822 USA Shandong University Jinan 250100 People’s Republic of China University of the Punjab Lahore-54590 Pakistan Huangshan College Huangshan 245000 People’s Republic of China University of Jinan Jinan 250022 People’s Republic of China KVI-CART University of Groningen NL-9747 AA Groningen Netherlands Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 D-35392 Giessen Germany Fudan University Shanghai 200443 People’s Republic of China Soochow University Suzhou 215006 People’s Republic of China Beijing Institute of Petrochemical Technology Beijing 102617 People’s Republic of China Lanzhou University Lanzhou 730000 People’s Republic of China Sun Yat-Sen University Guangzhou 510275 People’s Republic of China Sichuan University Chengdu 610064 People’s Republic of China Guangxi Normal University Guilin 541004 People’s Republic of China Indian Institute of Technology Madras Chennai 600036 India Shanxi University Taiyuan 030006 People’s Republic of China Henan University of Science and Technology Luoyang 471003 People’s Republic of China Zhejiang University Hangzhou 310027 People’s Republic of China University of Oxford Keble Rd Oxford OX13RH United Kingdom INFN and University of Perugia I-06100 Perugia Italy COMSATS University Islamabad Lahore Campus Defence Road Off Raiwind Road 54000 Lahore Pakistan Hunan Normal University Changsha 410081 People’s Republic of China Near East University Nicosia North Cyprus Mersin 10 Turkey Xinyang Normal University Xinyang 464000 People’s Republic of China Hunan University Changsha 410082 People’s Republic of China Hangzhou Normal University Hangzhou 310036 People’s Republic of China University of South China Hengyang 421001 People’s Republic of China China Center of Advanced Science and Technology Beijing 100190 People’s Republic of China University of Science and Technology Liaoning Anshan 114051 People’s Republic of China 

出 版 物：《Physical Review D》 (Phy. Rev. D)

年 卷 期：2019年第100卷第7期

页      面：072004-072004页

核心收录：

基　　金：CAS Key Research Program of Frontier Sciences, (QYZDJ-SSW-SLH003, QYZDJ-SSW-SLH040) INPAC Ministry of Development of Turkey, (DPT2006K-120470) National Science and Technology fund RuG U.S. Department of Energy, USDOE, (DE-FG02-05ER41374, DE-SC-0010118, DE-SC-0012069) U.S. Department of Energy, USDOE Royal Society, (DH160214) Royal Society Deutsche Forschungsgemeinschaft, DFG, (CRC 1044, FOR 2359) Deutsche Forschungsgemeinschaft, DFG Rijksuniversiteit Groningen, RUG Koninklijke Nederlandse Akademie van Wetenschappen, KNAW, (530-4CDP03) Koninklijke Nederlandse Akademie van Wetenschappen, KNAW National Natural Science Foundation of China, NSFC, (11335008, 11425524, 11625523, 11635010, 11735014) National Natural Science Foundation of China, NSFC Chinese Academy of Sciences, CAS Instituto Nazionale di Fisica Nucleare, INFN Knut och Alice Wallenbergs Stiftelse, (2016.0157) Knut och Alice Wallenbergs Stiftelse Vetenskapsrådet, VR GSI Helmholtzzentrum für Schwerionenforschung, GSI National Key Research and Development Program of China, NKRDPC, (2015CB856700) National Key Research and Development Program of China, NKRDPC CAS Center for Excellence in Particle Physics, CCEPP, (U1532257, U1532258, U1732263) CAS Center for Excellence in Particle Physics, CCEPP Shanghai Key Laboratory for Particle Physics and Cosmology, SKLPPC 

主　　题：Form factors Hadronic decays Lepton-lepton interactions Polarization in interactions & scattering 

摘      要：Using e+e−→Λc+Λ¯c− production from a 567 pb−1 data sample collected by BESIII at 4.6 GeV, a full angular analysis is carried out simultaneously on the four decay modes of Λc+→pKS0, Λπ+, Σ+π0, and Σ0π+. For the first time, the Λc+ transverse polarization is studied in unpolarized e+e− collisions, where a nonzero effect is observed with a statistical significance of 2.1σ. The decay asymmetry parameters of the Λc+ weak hadronic decays into pKS0, Λπ+, Σ+π0 and Σ0π+ are measured to be 0.18±0.43(stat)±0.14(syst), −0.80±0.11(stat)±0.02(syst), −0.57±0.10(stat)±0.07(syst), and −0.73±0.17(stat)±0.07(syst), respectively. In comparison with previous results, the measurements for the Λπ+ and Σ+π0 modes are consistent but with improved precision, while the parameters for the pKS0 and Σ0π+ modes are measured for the first time.