[1]Institute of High Energy Physics Chinese Academy of Science,Beijing,China
[2]Budker Institute of Nuclear Physics of the Siberian Branch of the RAS,Novosibirsk,Russian Federation
[3]CNRS Centre National de la Recherche Scientifique,Paris,France
[4]Ecole Polytechnique Federale de Lausanne, Institute of Physics,Lausanne,Switzerland
[5]University of Science and Technology of China, State Key Laboratory of Particle Detection and Electronics,Hefei,China
[6]LNF-INFN,,Italy
[7]Peking University, State Key Laboratory of Nuclear Physics and Technology,Beijing,China
[8]Ruhr-Universitat Bochum,Bochum,Germany
[9]Universite Savoie Mont Blanc,Chambery,France
[10]Laboratori Nazionali di Frascati di INFN,Frascati,Italy
[11]University of Minnesota Twin Cities,Minneapolis,United States
[12]
[13]Joint Institute for Nuclear Research, Dubna,Dubna,Russian Federation
[14]Carnegie Mellon University,Pittsburgh,United States
[15]Universitat Hamburg, Institute of Theoretical Physics,Hamburg,Germany
[16]State Key Laboratory of Particle Detection and Electronics,Beijing,China
[17]Beijing Engineering Research Center of Radiographic Techniques and Equipment,Beijing,China
[18]University of Manchester, School of Physics and Astronomy,Manchester,United Kingdom
[19]California Institute of Technology,Pasadena,United States
[20]Huangshan College,,China
[21]University of Minnesota Twin Cities, School of Physics and Astronomy,Minneapolis,United States
[22]Shanghai Jiaotong University,Shanghai,China
[23]Universita degli Studi di Torino,Torino,Italy
[24]Liaoning University,Shenyang,China
[25]Zhengzhou University,Zhengzhou,China
[26]University of Science and Technology of China,Hefei,China
[27]Istituto Nazionale Di Fisica Nucleare, Frascati,Frascati,Italy
[28]Tsinghua University, Center for High Energy Physics,Beijing,China
[29]GSI Helmholtz Centre for Heavy Ion Research GmbH,Darmstadt,Germany
[30]Saratov State University, Laboratory Metamaterials,Saratov,Russian Federation
[31]Guangxi University,Nanning,China
[32]Nanjing Normal University,Nanjing,China
[33]Henan Normal University,Xinxiang,China
[34]University of Hawaii at Manoa,Honolulu,United States
[35]Nankai University,Tianjin,China
[36]Huazhong Normal University,Wuhan,China
[37]University of Texas at Austin, Department of Physics,Austin,United States
[38]Nanjing University,Nanjing,China
[39]University of the Punjab Lahore,Lahore,Pakistan
[40]Shandong University,Jinan,China
[41]University of Tokyo, Department of Physics,Tokyo,Japan
[42]Justus Liebig University Giessen, Institute of Physics,Giessen,Germany
[43]The University of Hong Kong,Pokfulam,Hong Kong
[44]University of Science and Technology of China, Department of Modern Physics,Hefei,China
[45]Uppsala Universitet,Uppsala,Sweden
[46]Institute of Semiconductors Chinese Academy of Sciences, Optoelectronic System Laboratory,Beijing,China
[47]Chinese Academy of Sciences, State Key Laboratory of Geomechanics and Geotechnical Engineering,Beijing,China
[48]Duke University, Department of Physics,Durham,United States
[49]Rice University,Houston,United States
[50]Liaocheng University, Shandong Provincial Key Laboratory of Optical Communication Science and Technology,Liaocheng,China
[51]China Institute of Atomic Energy,Beijing,China
[52]Princeton University, Department of Physics,Princeton,United States
[53]Sun Yat-Sen University,Guangzhou,China
[54]Sichuan University,Chengdu,China
[55]Guangxi Normal University,Guilin,China
[56]Ohio State University,Columbus,United States
[57]Shanxi University,Taiyuan,China
[58]Shanxi University, Institute of Applied Chemistry,Taiyuan,China
[59]Brookhaven National Laboratory, Department of Physics,Upton,United States
[60]Los Alamos National Laboratory,Los Alamos,United States
[61]Wuhan University,Wuhan,China
[62]Macau University of Science and Technology, Faculty of Information Technology,Taipa,Macao
[63]Renmin University of China, Department of Physics,Beijing,China
[64]Tsinghua University,Beijing,China
[65]Chinese Academy of Sciences,Beijing,China
[66]Lanzhou University,Lanzhou,China
[67]Peking University, College of Environmental Science and Engineering,Beijing,China
[68]Johannes Gutenberg Universitat Mainz,Mainz,Germany
[69]Henan Normal University, Institute of Particle and Nuclear Physics,Xinxiang,China
[70]Fermi National Accelerator Laboratory,Batavia,United States
[71]Zhejiang University,Hangzhou,China
[72]Liaoning University, Department of Chemistry,Shenyang,China
[73]Lawrence Livermore National Laboratory,Livermore,United States
[74]Vanderbilt University,Nashville,United States
[75]Indiana University,Bloomington,United States
[76]Seoul National University,Seoul,South Korea
[77]Universita degli Studi di Perugia,Perugia,Italy
[78]The University of Hong Kong, Department of Physics,Pokfulam,Hong Kong
[79]Universitat Bonn, Helmholtz-Institut für Strahlen- und Kernphysik,Bonn,Germany
[80]Technische Universitat Berlin, Institute for Solid State Physics,Berlin,Germany
[81]Beihang University,Beijing,China
[82]University of Tokyo,Tokyo,Japan
[83]Henan Normal University, College of Physics and Electronic Engineering,Xinxiang,China
[84]University of Minnesota System,,United States
[85]National Taiwan University,Taipei,Taiwan
[86]Chengdu Institute of Organic Chemistry Chinese Academy of Sciences,Chengdu,China
[87]McGill University, Department of Physics,Montreal,Canada
[88]Huazhong University of Science and Technology, Department of Mechanics,Wuhan,China
[89]University of Florida,Gainesville,United States
[90]Helmholtz Institute Mainz,Mainz,Germany
[91]Soochow University,Suzhou,China
[92]Texas Tech University at Lubbock,Lubbock,United States
[93]Beijing Normal University, Key Laboratory of Beam Technology and Material Modification,Beijing,China
[94]East China Normal University, Department of Mathematics,Shanghai,China
[95]Nanjing Normal University, Department of Physics,Nanjing,China
[96]Huazhong Normal University, Institute of Particle Physics,Wuhan,China
[97]Peking University,Beijing,China
[98]East China Normal University, Department of Chemistry,Shanghai,China
[99]Nankai University, School of Physics,Tianjin,China
[100]Ecole Polytechnique Federale de Lausanne,Lausanne,Switzerland
[101]University of Science and Technology of China, Department of Chemical Physics,Hefei,China
[102]Hunan University,Changsha,China
[103]University of Shanghai for Science and Technology, School of Energy and Power Engineering,Shanghai,China
[104]Huazhong Normal University, Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics,Wuhan,China
[105]China Center of Advanced Science and Technology World Laboratory,Beijing,China
[106]Wuhan Electric Power Technical College,Wuhan,China
[107]Hunan University, School of Physics and Microelectronics Science,Changsha,China
[108]Donghua University, College of Materials Science and Engineering,Shanghai,China
[109]Argonne National Laboratory, High Energy Physics Division,Argonne,United States
[110]Chongqing University,Chongqing,China
[111]Shanghai Institute of Applied Physics, Chinese Academy of Sciences,Shanghai,China
[112]s University, Kingston, Department of Physics,Kingston,Canada
[113]Peking University, School of Physics,Beijing,China
[114]Hefei National Laboratory for Physical Sciences at Microscale, Synergetic Innovation Center of Quantum Information and Quantum Physics,Hefei,China
[115]Sichuan University, Department of Periodontics,Chengdu,China
[116]Tianjin University, School of Environmental Science and Engineering,Tianjin,China
[117]Guangxi University, Physics Science and Engineering Technology Department,Nanning,China
[118]University of South China,Hengyang,China
[119]Faculdade de Ciencias e Tecnologia, New University of Lisbon, Dep Fisica,Caparica,Portugal
[120]University of Science and Technology Liaoning,Anshan,China
[121]Institute of High Energy Physics Chinese Academy of Science, Experimental Physics Division,Beijing,China
The decays χcJ→γV (V=φ, ρ0, ω) are studied with a sample of radiative ψ′→γχ cJ events in a sample of (1.06±0.04) ×108ψ′ events collected with the BESIII detector. The branching fractions are determined to be: B(χc1→γ φ)=(25.8±5.2±2.3)×10-6, B(χ c1→γρ0)=(228±13±22)×10 -6, and B(χc1→γω)=(69.7±7. 2±6.6)×10-6. The decay χ c1→γφ is observed for the first time. Upper limits at the 90% confidence level on the branching fractions for χc0 and χc2 decays into these final states are determined. In addition, the fractions of the transverse polarization component of the vector meson in χc1→γV decays are measured to be 0.29-0.12-0.09+0. 13+0.10 for χc1→γ φ, 0.158±0.034-0.014+0. 015 for χc1→γρ0, and 0.247-0.087-0.026+0.090+0.044 for χc1→γω, respectively. The first errors are statistical and the second ones are systematic. ? 2011 American Physical Society.
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