Study of the doubly radiative decay J/ψ-->γγρ0
Abstract
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.
- Publication:
-
Physical Review D
- Pub Date:
- March 1990
- DOI:
- 10.1103/PhysRevD.41.1410
- Bibcode:
- 1990PhRvD..41.1410C