Evidence for psi' Decays into gammapi0 and gammaeta
M. Ablikim, M. N. Achasov, L. An, Q. An, Z. H. An, J. Z. Bai, R. Baldini, Y. Ban, J. Becker, N. Berger, M. Bertani, J. M. Bianhttp://academic.research.microsoft.com/io.ashx?type=5&id=27617651&selfId1=0&selfId2=0&maxNumber=12&query=
The decays psi'-->gammapi0, gammaeta and gammaeta' are studied using data collected with the BESIII detector at the BEPCII e+e- collider. The processes psi'-->gammapi0 and psi'-->gammaeta are observed for the first time with signal significances of 4.6sigma and 4.3sigma, respectively. The branching fractions are determined to be B(psi'-->gammapi0)=(1.58±0.40±0.13)×10-6, B(psi'-->gammaeta)=(1.38±0.48±0.09)×10-6, and B(psi'-->gammaeta')=(126±3±8)×10-6, where the first errors are statistical and the second ones systematic.