We present a study of the decay sequence J X, X 0, 0 + -, based on 5.8 × 106 produced J collected by the Mark III detector at the SLAC storage ring SPEAR. In the 0 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 (1430) for the high-mass peak. Product branching fractions for both objects are presented.
ASJC Scopus subject areas
- Nuclear and High Energy Physics