Phys. Rev. D 41, 1410–1413 (1990)Study of the doubly radiative decay J/ψ→γγρ0Received 17 October 1989; published in the issue dated 1 March 1990 We present a study of the decay sequence J/ψ→γX, X→γρ0, ρ0→π+π-, based on 5.8 × 106 produced J/ψ collected by the Mark III detector at the SLAC storage ring SPEAR. In the γρ0 mass spectrum, we find two peaks with masses and widths consistent with the axial-vector mesons f1(1285) and f1(1420) that have recently been observed in two-photon collisions. Fits to the angular distributions confirm that the first peak is an axial-vector state, but are unable to distinguish between the f1(1420) or the pseudoscalar η(1430) for the high-mass peak. Product branching fractions for both objects are presented. © 1990 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.41.1410
DOI:
10.1103/PhysRevD.41.1410
PACS:
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