A study of the channel produced centrally in pp interactions at 450 GeV/c

Abstract Results are presented of an analysis of the reactions pp → p f ( K S 0 K ± π ± ) p s and pp → p f ( K S 0 K S 0 π 0 ) p s at 450 GeV/c. Clear f 1 (1285) and f 1 (1420) signals are seen and a spin parity analysis shows that both have I G J PC = 0 + 1 ++ . The f 1 (1285) decays to a 0 (980) π and the f 1 (1420) decays to K ∗ K . Both states have a similar dependence as a function of dP T consistent with has been observed for other q q states. Evidence is also presented for a K ∗ K decay mode of the η 2 (1620).