Observations of the Cabibbo-Suppressed decays ■→nπ+π0,nπ+π-π+and the Cabibbo-Favored decay ■→nK-π+π+

作     者：麦迪娜 M.N.Achasov P.Adlarson M.Albrecht R.Aliberti A.Amoroso 安美儒 安琪 白羽 O.Bakina R.Baldini Ferroli I.Balossino 班勇 V.Batozskaya D.Becker K.Begzsuren N.Berger M.Bertani D.Bettoni F.Bianchi E.Bianco J.Bloms A.Bortone I.Boyko R.A.Briere A.Brueggemann 蔡浩 蔡啸 A.Calcaterra 曹国富 曹宁 S.A.Cetin 常劲帆 常万玲 车国荣 G.Chelkov 陈琛 陈超 陈刚 陈和生 陈玛丽 陈申见 陈少敏 T.Chen 陈旭荣 X.T.Chen 陈元柏 陈卓俊 成伟帅 S.K.Choi 初晓 G.Cibinettov F.Cossio 崔佳佳 代洪亮 代建平 A.Dbeyssi R.E.de Boer D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis F.De Mori 丁勇 丁逸 董静 董燎原 董明义 董翔 杜书先 段宗欢 P.Egorov 范玉兰 方建 房双世 方文兴 方易 R.Farinelli L.Fava69B F.Feldbauer G.Felici 封常青 冯俊华 K Fischer M.Fritsch C.Fritzsch 傅成栋 高涵 高原宁 高扬 S.Garbolino I.Garzia 葛潘婷 葛振武 耿聪 E.M.Gersabeck A Gilman K.Goetzen 龚丽 龚文煊 W.Gradl M.Greco 谷立民 顾旻皓 顾运厅 关春懿 郭爱强 郭立波 郭如盼 郭玉萍 A.Guskov 韩文颖 郝喜庆 F.A.Harris 何凯凯 何康林 F.H.Heinsius C.H.Heinz 衡月昆 C.Herold 侯国一 侯颖锐 侯治龙 胡海明 J.F.Hu 胡涛 胡誉 黄光顺 黄凯旋 黄麟钦 黄性涛 黄燕萍 黄震 T.Hussain N Hüsken W.Imoehl M.Irshad J.Jackson S.Jaeger S.Janchiv E.Jang J.H.Jeong 纪全 姬清平 季晓斌 季筱璐 吉钰瑶 贾泽坤 姜赛赛 江晓山 Y.Jiang 焦健斌 焦铮 金山 金毅 荆茂强 T.Johansson N.Kalantar-Nayestanaki 康晓珅 R.Kappert M.Kavatsyuk 柯百谦 I.K.Keshk A.Khoukaz R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc W.Kühn J.J.Lane J.S.Lange P.Larin A.Lavania L.Lavezzi 雷祚弘 H.Leithoff M.Lellmann T.Lenz 李翠 李聪 李春花 李澄 李德民 李飞 李刚 李慧 李贺 李海波 李惠静 H.N.Li J.Q.Li 李静舒 李井文 李科 L.J Li 李龙科 李蕾 李明浩 李培荣 李素娴 栗帅迎 李腾 李卫东 李卫国 李旭红 李晓玲 李晓宇 李彦谷 李振轩 李紫源 梁畅 梁昊 梁浩 梁勇飞 梁羽铁 廖广睿 廖龙洲 J.Libby A.Limphirat 林创新 林德旭 T.Lin 刘北江 刘成 刘春秀 D.Liu 刘福虎 刘芳 刘峰 G.M.Liu H.Liu 刘宏邦 刘怀民 刘欢欢 刘汇慧 刘建北 刘佳俊 刘晶译 刘凯 刘魁勇 刘珂 刘亮 刘露 刘美宏 刘佩莲 刘倩 刘树彬 刘桐 刘维克 刘卫民 刘翔 刘英 刘玉斌 刘振安 刘智青 娄辛丑 卢飞翔 吕海江 吕军光 陆小玲 卢宇 卢云鹏 Z.H.Lu 罗成林 罗民兴 罗涛 罗小兰 吕晓睿 吕翌丰 马凤才 马海龙 马连良 马明明 马秋梅 马润秋 马瑞廷 马骁妍 马尧 F.E.Maas M.Maggiora S.Maldaner S.Malde Q.A.Malik A.Mangoni 冒亚军 毛泽普 S.Marcello 孟召霞 J.G.Messchendorp G.Mezzadri H.Miao 闵天觉 R.E.Mitchell 莫晓虎 N.Yu.Muchnoi Y.Nefedov F.Nerling I.B.Nikolaev 宁哲 S.Nisar 牛艳 S.L.Olsen 欧阳群 S.Pacetti 潘祥 潘越 A.Pathak P.Patteri M.Pelizaeus 彭海平 K.Peters 平加伦 平荣刚 S.Plura S.Pogodin V.Prasad 齐法制 齐航 漆红荣 祁鸣 齐天钰 钱森 钱文斌 钱圳 乔从丰 秦佳佳 秦丽清 覃潇平 秦小帅 秦中华 邱进发 屈三强 K.H.Rashid C.F.Redmer 任旷洁 A.Rivetti V.Rodin M.Rolo 荣刚 Ch.Rosner 阮氏宁 A.Sarantse Y.Schelhaas C.Schnier K.Schoenning M.Scodeggio 尚科羽 单葳 单心钰 上官剑锋 邵立港 邵明 沈成平 沈宏飞 沈肖雁 施伯安 石煌超 石京燕 石勤强 师荣盛 史欣 师晓东 宋娇娇 宋维民 宋昀轩 S.Sosio S.Spataro F.Stieler 苏可馨 苏彭彭 粟杨捷 孙功星 H.Sun 孙浩凯 孙俊峰 孙亮 孙胜森 孙童 孙文玉 孙勇杰 孙永昭 孙振田 谭英华 谭雅星 唐昌建 唐光毅 唐健 陶璐燕 陶秋田 M.Tat 滕佳秀 V.Thoren 田文辉 田野 王斌 王滨龙 王成伟 王大勇 王菲 王泓鉴 王宏鹏 王科 王亮亮 王萌 王梦真 王蒙 王顺 王婷 王腾蛟 王为 王文欢 王维平 王轩 王雄飞 王小龙 王亦 王雅迪 王贻芳 王英豪 王雨晴 王亚乾 王铮 王至勇 王子一 魏代会 F.Weidner 文硕频 D.J.White U.Wiedner G.Wilkinson M.Wolke L.Wollenberg 吴金飞 伍灵慧 吴连近 吴潇 伍雄浩 Y.Wu 吴英杰 吴智 夏磊 相腾 肖栋 肖光延 肖浩 肖素玉 肖云龙 肖振军 谢陈 谢昕海 谢勇 谢宇广 谢跃红 谢智鹏 邢天宇 C.F.Xu 许创杰 许国发 许皓月 徐庆君 徐新平 胥英超 许泽鹏 严芳 严亮 鄢文标 闫文成 杨海军 杨昊霖 杨洪勋 杨玲 杨涛 杨艳芳 杨逸翔 杨翊凡 叶梅 叶铭汉 殷俊昊 尤郑昀 俞伯祥 喻纯旭 余刚 于涛 余旭东 苑长征 袁丽 S.C.Yuan 袁晓庆 袁野 袁朝阳 岳崇兴 A.A.Zafar 曾凡蕊 曾鑫 曾云 翟星晔 詹永华 张安庆 B.L.Zhang 张丙新 张丹昊 张广义 H.Zhang 张宏浩 张宏宏 章红宇 张杰磊 张敬庆 张家文 J.X.Zhang 张建勇 张景芝 张剑宇 张嘉伟 张黎明 张丽青 张雷 P.Zhang 张秋岩 张水涵 张书磊 张小东 X.M.Zhang 张学尧 张旭颜 张亚腾 张银鸿 张言 张瑶 张兆领 张振宇 张子羽 赵光 赵静 赵静宜 赵京周 赵雷 赵玲 赵明刚 赵书俊 赵豫斌 赵宇翔 赵政国 A.Zhemchugov 郑波 郑建平 郑阳恒 钟彬 钟翠 钟鑫 周航 周利鹏 周详 周晓康 周小蓉 周兴玉 周袆卓 朱江 朱凯 朱科军 朱琳萱 朱世海 朱仕强 朱腾蛟 朱文静 朱莹春 朱自安 邹佳恒 

作者机构：Institute of High Energy Physics G.I.Budker Institute of Nuclear Physics SB RAS (BINP) the Novosibirsk State University Uppsala University Bochum Ruhr-University Johannes Gutenberg University of Mainz University of Turin INFN Liaoning Normal University State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Southeast University Joint Institute for Nuclear Research INFN Laboratori Nazionali di Frascati INFN Sezione di Ferrara Peking University State Key Laboratory of Nuclear Physics and Technology Peking University National Centre for Nuclear Research Institute of Physics and Technology University of Muenster Carnegie Mellon University Wuhan University University of Chinese Academy of Sciences Istinye University Nankai University the Moscow Institute of Physics and Technology Soochow University Nanjing University Tsinghua University Institute of Modern Physics Hunan University School of Physics and Electronics Hunan University Shandong University Yunnan University Helmholtz Institute Mainz Liaoning University Jilin University Zhengzhou University Sun Yat-Sen University University of Oxford University of Ferrara University of Manchester GSI Helmholtzcentre for Heavy Ion Research GmbH Guangxi University Nanjing Normal University Shandong Normal University Fudan University Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics Fudan University Henan Normal University University of Hawaii Suranaree University of Technology University Avenue 111 South China Normal University i University of the Punjab Indiana University Huangshan College University of Jinan University of Groningen Justus-Liebig-Universitaet Giessen II.Physikalisches Institut Indian Institute of Technology Madras Qufu Normal University Shanxi University Guangdong Provincial Key Laboratory of Nuclear Science Institute of Quantum Matter South China Normal University Beijing Institute of Petrochemical Technology Lanzhou University Frontiers Science Center for Rare Isotopes Lanzhou University Lanzhou Center for Theoretical Physics Lanzhou University Sichuan University Guangxi Normal University Central China Normal University Henan University of Science and Technology University of South China Henan University of Technology Central South University INFN Sezione di Perugia Goethe University Frankfurt COMSATS University Islamabad Lahore Campus the Department of Mathematical Sciences IBA University of Perugia the NRC "Kurchatov Institute" PNPI Hunan Normal University North China Electric Power University Hebei University Hangzhou Normal University Shanghai Jiao Tong University 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 China Center of Advanced Science and Technology Beihang University Xinyang Normal University University of Science and Technology Liaoning 

出 版 物：《Chinese Physics C》 (中国物理C)

年 卷 期：2023年第2期

页      面：5-22页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported in part by National Key R & D Program of China (2020YFA0406400, 2020YFA0406300) National Natural Science Foundation of China (NSFC) (11635010, 11735014, 11805086, 11835012, 11935015, 11935016, 11935018, 11975011, 11961141012, 12022510, 12025502, 12035009, 12035013, 12192260, 12192261, 12192262, 12192263, 12192264, 12192265) the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program Joint Large-Scale Scientific Facility Funds of the NSFC and CAS (U1832207) the CAS Center for Excellence in Particle Physics (CCEPP) 100 Talents Program of CAS Fundamental Research Funds for the Central Universities, Lanzhou University, University of Chinese Academy of Sciences The Institute of Nuclear and Particle Physics (INPAC) Shanghai Key Laboratory for Particle Physics and Cosmology ERC (758462) German Research Foundation DFG (443159800) Collaborative Research Center CRC 1044, GRK 2149 Istituto Nazionale di Fisica Nucleare, Italy Ministry of Development of Turkey (DPT2006K-120470) National Science and Technology fund National Science Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation (B16F640076 STFC) (United Kingdom) Suranaree University of Technology (SUT) Thailand Science Research and Innovation (TSRI) National Science Research and Innovation Fund (NSRF) (160355) The Royal Society, UK (DH140054, DH160214) The Swedish Research Council U.S.Department of Energy (DEFG02-05ER41374) 

主　　题：∧c+ baryon Branching fraction BESⅢ detector 

摘      要：Using electron-positron annihilation data samples corresponding to an integrated luminosity of 4.5 fb-1,collected by the BESⅢ detector in the energy region between 4599.53 MeV and 4698.82 MeV,we report the first observations of the Cabibbo-suppressed decays Λc+→nπ+π0,Λc+→nπ+π-π+,and the Cabibbo-favored decayΛc+→nK-π+π+with statistical significances of 7.9σ,7.8σ,and 10σ,*** branching fractions of these decays are measured to be B（Λc+→nπ+π0）=（0.64±0.09±0.02）%,B（Λc+→nπ+π-π+）=（0.45±0.07±0.03）%,and B（Λc+→nK-π+π+）=（1.90±0.08±0.09）%,where the first uncertainties are statistical and the second are *** find that the branching fraction of the decay Λc+→nπ+π0is about one order of magnitude higher than that of Λc+→nπ+.