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Observation of a p mass threshold enhancement in ψ′→π+π-J/ψ(J/ψ→γp) decay

Chinese Physics C 2010年第4期34卷 421-426页

作者：麦迪娜 M. N. Achasov 安磊安琪安正华白景芝班勇 N. Berger 边渐鸣 I. Boyko R. A. Briere v. Bytev 蔡啸曹国富曹学香常劲帆 G. Chelkov 陈刚陈和生陈江川陈丽平陈玛丽陈鹏陈申见陈元柏初元萍 D. Cronin-Hennessy 代洪亮代建平 D. Dedovich 邓子艳 I. Denysenko M. Destefanis 丁勇董燎原董明义杜书先段麦英方建封常青傅成栋傅金林高原宁耿聪 K. Goetzen 龚文煊 M. Greco S. Grishin 顾运厅郭爱强郭立波郭玉萍韩少卿 f. A. Harris 何康林何苗何振亚衡月昆侯治龙胡海明胡继峰胡涛胡小为黄彬黄光明黄金书黄性涛黄燕萍姬长胜纪全季晓斌季筱璐贾卢魁姜丽丽江晓山焦健斌金大鹏金山 S. Komamiya W. Kuehn S. Lange 梁干庄李澄李翠李德民李飞李刚李海波李捷李家才李蕾李陆李秋菊李卫东李卫国李晓玲李小男李学潜李秀荣李玉晓李志兵梁昊梁泰然 Y.T. Liang 梁勇飞廖广睿廖小涛刘北江刘春秀刘春燕刘福虎刘芳刘峰刘冠川刘虎刘宏邦刘怀民刘红薇刘健刘觉平刘坤刘魁勇刘树彬刘晓海刘玉斌刘艳芳刘衍文刘勇刘振安鲁公儒吕军光吕绮雯吕晓睿卢云鹏罗成林罗民兴Zhejiang University 罗涛罗小兰马长利马凤才马海龙马秋梅马想马骁妍 M. Maggiora 冒亚军毛泽普闵建莫晓虎 N. Yu. Muchnoi Y. Nefedov 宁飞鹏 S. L. Olsen 欧阳群 M. Pelizaeus K. Peters 平加伦平荣刚 R. Poling 潘振声祁鸣钱森乔从丰邱进发荣刚阮向东 Sarantsev 邵明沈肖雁盛华义 S. Sonoda S. Spataro B. Spruck 孙德辉孙功星孙俊峰孙胜森孙晓东孙勇杰孙永昭孙志嘉孙振田唐昌建唐晓唐秀福田浩来 D. Toth G. S. varner 万霞王博群王纪科王科王亮亮王灵淑王平王佩良王强王思广王晓东汪晓莲王雅迪王贻芳王亚乾王铮王志刚王至勇魏代会文硕频 U. Wiedner 伍灵慧吴宁吴元明吴智肖振军谢宇广许国发徐光明徐昊徐敏徐明徐新平徐晔许咨宗薛镇严亮鄢文标颜永红杨洪勋杨明杨璞杨世明杨永栩叶梅叶铭汉俞伯祥喻纯旭俞玲苑长征袁野曾云张丙新张炳云张长春张达华张宏浩章红宇张家文张建勇张景芝张雷张书华张学尧张瑶张银鸿张子平赵川赵海升赵家伟赵京伟赵雷赵玲赵明刚赵强赵书俊赵祥虎赵豫斌赵政国 A. Zhemchugov 郑波郑建平郑阳恒郑志鹏钟彬周莉周中良朱程朱凯朱科军朱启明朱兴旺朱永生朱自安庄建邹冰松邹佳恒左嘉旭 P. Zweber Institute of High Energy Physics CAS G.I. Budker Institute of Nuclear Physics SB RAS (BINP) Guangxi University University of Science and Technology of China Peking University Joint Institute for Nuclear Research Carnegie Mellon University the Moscow Institute of Physics and Technology Nanjing University University of Minnesota the Bogolyubov Institute for Theoretical Physics University of Turin and INfN Liaoning University Zhengzhou University Shanxi University Tsinghua University GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Nankai University Nanjing Normal University University of Hawaii Graduate University of Chinese Academy of Sciences Huazhong Normal University Henan Normal University Shandong University The University of Tokyo Universitaet Giessen The University of Hong Kong Sun Yat-Sen University Sichuan University Guangxi Normal University The Chinese University of Hong Kong Wuhan University Seoul National University Bochum Ruhr-University China Center of Advanced Science and Technology currently at Suzhou University Hunan University

The decay channel ψ′→ π 〉＋π^-J/ψ（J/ψ 〉 γp^-p） is studied using a sample of 1.06 × 10^8 ψ′ events collected by the BESIII experiment at BEPCII. A strong enhancement at threshold is observed in the p^-p invariant mass spectrum. The enhancement can be fitted with an S-wave Breit-Wigner resonance function with a resulting peak mass of M = 1861-13^＋6 （stat）-26^＋7 （syst） Mev/c^2 and a narrow width that is Г 〈 38 Mev/c^2 at the 90% confidence level. These results are consistent with published BESII results. These mass and width values do not match with well established mesons.

关键词： p^-p threshold enhancement

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Sub-percent precision measurement of neutrino oscillation parameters with JUNO

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Chinese Physics C 2022年第12期46卷 28-49页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Rizwan Ahmed Sebastiano Aiello Muhammad Akram Abid Aleem fengpeng An Qi An Giuseppe Andronico Nikolay Anfimov vito Antonelli Tatiana Antoshkina Burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste Weidong Bai Nikita Balashov Wander Baldini Andrea Barresi Davide Basilico Eric Baussan Marco Bellato Antonio Bergnoli Thilo Birkenfeld Sylvie Blin David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Jose Busto Ilya Butorov Anatael Cabrera Barbara Caccianiga Hao Cai Xiao Cai Yanke Cai Zhiyan Cai Riccardo Callegari Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Chi Chan Jinfan Chang Yun Chang Guoming Chen Pingping Chen Po-An Chen Shaomin Chen Xurong Chen Yixue Chen Yu Chen Zhiyuan Chen Zikang Chen Jie Cheng Yaping Cheng Yu Chin Cheng Alexey Chetverikov Davide Chiesa Pietro Chimenti Artem Chukanov Gérard Claverie Catia Clementi Barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti flavio Dal Corso Olivia Dalager Christophe De La Taille Zhi Deng Ziyan Deng Wilfried Depnering Marco Diaz Xuefeng Ding Yayun Ding Bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Dmitry Dolzhikov Georgy Donchenko Jianmeng Dong Evgeny Doroshkevich Marcos Dracos frédéric Druillole Ran Du Shuxian Du Stefano Dusini Martin Dvorak Timo Enqvist Heike Enzmann Andrea fabbri Donghua fan Lei fan Jian fang Wenxing fang Marco fargetta Dmitry fedoseev Zhengyong fei Li-Cheng feng Qichun feng Richard ford Amélie fournier Haonan Gan feng Gao Alberto Garfagnini Arsenii Gavrikov Marco Giammarchi Nunzio Giudice Maxim Gonchar Guanghua Gong Hui Gong Yuri Gornushkin Alexandre Göttel Marco Grassi vasily Gromov Minghao Gu Xiaofei Gu Yu Gu Mengyun Guan Yuduo Guan Nunzio Guardone Cong Guo Jingyuan Guo Wanlei Guo Xinheng Guo Yuhang Guo Paul Hackspacher Caren Hagner Ran Han Yang Han Miao He Wei He Tobias Heinz Patrick Hellmuth Yuekun Heng Rafael Herrera YuenKeung Ho Yerevan Physics Institute YerevanArmenia UniversiéLibre de Bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro Rio de JaneiroBrazil Pontificia Universidad Católica de Chile SantiagoChile Universidad Tecnica federico Santa Maria ValparaisoChile Beijing Institute of Spacecraft Environment Engineering BeijingChina Beijing Normal University BeijingChina China Institute of Atomic Energy BeijingChina Institute of High Energy Physics BeijingChina North China Electric Power University BeijingChina School of Physics Peking UniversityBeijingChina Tsinghua University BeijingChina University of Chinese Academy of Sciences BeijingChina Jilin University ChangchunChina College of Electronic Science and Engineering National University of Defense TechnologyChangshaChina Chongqing University ChongqingChina Dongguan University of Technology DongguanChina Jinan University GuangzhouChina Sun Yat-Sen University GuangzhouChina Harbin Institute of Technology HarbinChina University of Science and Technology of China HefeiChina The Radiochemistry and Nuclear Chemistry Group in University of South China HengyangChina Wuyi University JiangmenChina Shandong University JinanChinaand Key Laboratory of Particle Physics and Particle Irradiation of Ministry of EducationShandong UniversityQingdaoChina Institute of Modern Physics Chinese Academy of SciencesLanzhouChina Nanjing University NanjingChina Guangxi University NanningChina East China University of Science and Technology ShanghaiChina School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuangChina Nankai University TianjinChina Wuhan University WuhanChina Xi'an Jiaotong University Xi'anChina Xiamen University XiamenChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhou

JUNO is a multi-purpose neutrino observatory under construction in the south of *** publication presents new sensitivity estimates for the measurement of the △m_(31)^(2),△m_(21)^(2),sin^(2)θ_(12),and sin^(2)θ_(13) oscillation parameters using reactor antineutrinos,which is one of the primary physics goals of the *** sensitivities are obtained using the best knowledge available to date on the location and overburden of the experimental site,the nuclear reactors in the surrounding area and beyond,the detector response uncertainties,and the reactor antineutrino spectral shape constraints expected from the TAO satellite *** is found that the △m_(21)^(2) and sin^(2)θ_(12) oscillation parameters will be determined to 0.5%precision or better in six years of data *** the same period,the △m_(31)^(2) parameter will be determined to about 0.2%precision for each mass ordering *** new precision represents approximately an order of magnitude improvement over existing constraints for these three parameters.

关键词： neutrino oscillation reactor antineutrino precision measurement JUNO

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黑线仓鼠白化突变群的遗传特性和应用

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北京实验动物科学 1993年第4期10卷 22-25页

作者：徐植岚洪宝庆刘秀林李盈祺焦克卿贾致鑫军事医学科学院实验动物中心军事医学科学院放射医学研究所

黑线仓鼠白化突变群是我们在驯育野生黑线仓鼠过程中,对发现的6只该鼠白化突变体,通过8年人工繁育建成的目前国内外唯一的黑线仓鼠白化种群。培育期间对动物白化性状的遗传方式和染色体核型进行了观察。试验表明,白化黑线仓鼠特别适用... 详细信息

黑线仓鼠白化突变群是我们在驯育野生黑线仓鼠过程中,对发现的6只该鼠白化突变体,通过8年人工繁育建成的目前国内外唯一的黑线仓鼠白化种群。培育期间对动物白化性状的遗传方式和染色体核型进行了观察。试验表明,白化黑线仓鼠特别适用于辐射和化学诱变的细胞遗传学研究,是评价抗辐射药效价及测定新药致突变遗传效应研究的理想的实验动物。

关键词：黑线仓鼠白化突变群遗传特性

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JUNO sensitivity on proton decay p→νK^(+)searches

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Chinese Physics C 2023年第11期47卷 7-22页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Rizwan Ahmed Sebastiano Aiello Muhammad Akram 安丰鹏安琪 Giuseppe Andronico Nikolay Anfimov vito Antonelli Tatiana Antoshkina Burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste Nikita Balashov Wander Baldini Andrea Barresi Davide Basilico Eric Baussan Marco Bellato Antonio Bergnoli Thilo Birkenfeld Sylvie Blin David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Mario Buscemi Jose Busto Ilya Butorov Anatael Cabrera Barbara Caccianiga 蔡浩蔡啸蔡严克蔡志岩 Riccardo Callegari Antonio Cammi Agustin Campeny 曹传亚曹国富曹俊 Rossella Caruso Cédric Cerna 常劲帆 Yun Chang 陈平平 Po-An Chen 陈少敏陈旭荣 Yi-Wen Chen 陈义学陈羽陈长程捷程雅苹 Alexey Chetverikov Davide Chiesa Pietro Chimenti Artem Chukanov Gérard Claverie Catia Clementi Barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti flavio Dal Corso Olivia Dalager Christophe De La Taille 邓智邓子艳 Wilfried Depnering Marco Diaz Xuefeng Ding 丁雅韵 Bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Dmitry Dolzhikov Georgy Donchenko 董建蒙 Evgeny Doroshkevich Marcos Dracos frédéric Druillole 杜然杜书先 Stefano Dusini Martin Dvorak Timo Enqvist Heike Enzmann Andrea fabbri Ulrike fahrendholz 范东华樊磊方建方文兴 Marco fargetta Dmitry fedoseev Li-Cheng feng 冯启春 Richard ford Amélie fournier 甘浩男 feng Gao Alberto Garfagnini Arsenii Gavrikov Marco Giammarchi Agnese Giaz Nunzio Giudice Maxim Gonchar 龚光华宫辉 Yuri Gornushkin Alexandre Göttel Marco Grassi Christian Grewing vasily Gromov 顾旻皓谷肖飞古宇关梦云 Nunzio Guardone Maria Gul 郭聪郭竞渊郭万磊郭新恒郭宇航 Paul Hackspacher Caren Hagner 韩然 Yang Han Muhammad Sohaib Hassan 何苗何伟 Tobias Heinz Patrick Hellmuth 衡月昆 Rafael Herrera 贺远强侯少静 Yee Hsiung Bei-Zhen Hu 胡航胡健润胡俊胡守扬胡涛胡宇翔胡焯钧黄春豪黄桂鸿黄翰雄黄文昊黄鑫黄性涛黄永波惠加琪霍雷霍文驹 Cédric Huss Safeer Hussain Ara Ioannisian Roberto Isocrate Beatrice Jelmini Kuo-Lun Jen Ignacio Jeria 季筱璐吉星曌贾慧慧贾俊基蹇司玉蒋荻蒋炜江晓山金如意荆小平 Cécile Jollet Jari Joutsenvaara Sirichok Jungthawan Leonidas Kalousis Philipp Ka Pontificia Universidad Católica de Chile SantiagoChile IPHC Universitéde StrasbourgCNRS/IN2P3F-67037 StrasbourgFrance Pakistan Institute of Nuclear Science and Technology IslamabadPakistan INfN Catania and Dipartimento di fisica e Astronomia dell Universitàdi Catania CataniaItaly East China University of Science and Technology ShanghaiChina University of Science and Technology of China HefeiChina Joint Institute for Nuclear Research DubnaRussia INfN Sezione di Milano and Dipartimento di fisica dell Universitàdi Milano MilanoItaly Department of Physics Faculty of ScienceChulalongkorn UniversityBangkokThailand IJCLab UniversitéParis-SaclayCNRS/IN2P391405 OrsayFrance Department of Physics and Earth Science University of Ferrara and INFN Sezione di FerraraFerraraItaly INfN Milano Bicocca and University of Milano Bicocca MilanoItaly INfN Sezione di Padova PadovaItaly III.Physikalisches Institut B RWTH Aachen UniversityAachenGermany Eberhard Karls Universität Tübingen Physikalisches InstitutTübingenGermany Institute of High Energy Physics BeijingChina SUBATECH Universitéde NantesIMT AtlantiqueCNRS-IN2P3NantesFrance Univ.Bordeaux CNRSLP2IUMR 5797F-33170 GradignanFrance Department of Physics National Taiwan UniversityTaipei Dipartimento di fisica e Astronomia dell’Universitàdi Padova and INfN Sezione di Padova PadovaItaly University of Roma Tre and INfN Sezione Roma Tre RomaItaly Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Wuhan University WuhanChina INfN Milano Bicocca and Politecnico of Milano MilanoItaly National United University Miao-Li Dongguan University of Technology DongguanChina Tsinghua University BeijingChina Institute of Modern Physics Chinese Academy of SciencesLanzhouChina Institute of Physics National Yang Ming Chiao Tung UniversityHsinchu North China Electric Power University BeijingChina Sun Yat-Sen University GuangzhouChina Beijing Institute of Spacecraft Environment Engineering BeijingChina Universidade Estadual de Londrina LondrinaBrazil INfN Sez

The Jiangmen Underground Neutrino Observatory(JUNO)is a large liquid scintillator detector designed to explore many topics in fundamental *** this study,the potential of searching for proton decay in the p→νK^(+)mode with JUNO is *** kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for ***,the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed *** on these advantages,the detection efficiency for the proton decay via p→νK^(+)is 36.9%±4.9%with a background level of 0.2±0.05(syst)±0.2(stat)events after 10 years of data *** estimated sensitivity based on 200 kton-years of exposure is 9.6×1033 years,which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies.

关键词： proton decay grand unified theories JUNO liquid scintillator detector

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