Journal
PHYSICAL REVIEW D
Volume 83, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.83.112005
Keywords
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Funding
- Ministry of Science and Technology of China [2009CB825200]
- National Natural Science Foundation of China (NSFC) [10625524, 10821063, 10825524, 10835001, 10935007]
- Chinese Academy of Sciences (CAS) [KJCX2-YW-N29, KJCX2-YW-N45]
- Istituto Nazionale di Fisica Nucleare, Italy
- Russian Foundation for Basic Research [08-02-92221, 08-02-92200-NSFC-a]
- Siberian Branch of Russian Academy of Science [32]
- U.S. Department of Energy [DE-FG02-04ER41291, DE-FG02-91ER40682, DE-FG02-94ER40823]
- University of Groningen (RuG)
- Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt
- National Research Foundation of Korea [R32-2008-000-10155-0]
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The decays chi(cJ) -> gamma V ( V = phi, rho(0), omega) are studied with a sample of radiative psi' -> gamma chi(cJ) events in a sample of (1.06 +/- 0.04) X 10(8)psi' events collected with the BESIII detector. The branching fractions are determined to be: B(chi c1 -> gamma phi) = 25.8 +/- 5.2 +/- 2.3 X 10(-6), B(chi(c1) -> gamma rho(0)) = (228 +/- 13 +/- 22) X 10(-6), and B(chi(c1) -> gamma omega) = (69.7 +/- 7.2 +/- 6.6) X 10(-6). The decay chi(c1) -> gamma phi is observed for the first time. Upper limits at the 90% confidence level on the branching fractions for chi(c0) and chi(c2) decays into these final states are determined. In addition, the fractions of the transverse polarization component of the vector meson in chi(c1) -> gamma V decays are measured to be 0.29(-0.12-0.09)(+0.13+0.10) fo chi(c1) -> gamma phi, 0.158 +/- 0.037(-0.014)(+0.015) for chi(c1) -> gamma rho(o), and 0.247(-0.087-0.026)(+0.090+0.044) for chi(c1) -> gamma omega, respectively. The first errors are statistical and the second ones are systematic.
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