Abstract
Two (Kππ) enhancements called K ∗(1320) and the L-meson are observed in 10 GeV/ c K −p interactions, with masses of (1325±6) and (1785±12) MeV and widths of (186±15) and (127±43) MeV, respectively. A peak near 1790 MeV is also observed in the (Kπππ) − mass distribution. Evidence for a (Kω) decay mode of the L-meson is presented. It is shown that the K ∗(1320) peak is not a kinematic effect of the Deck-type. A maximum likelihood analysis of the (Kππ) − channels indicates that the favoured spin-parity assignment for K ∗(1320) is J P = 1 + (with 2 − less probable) and for the L-meson J P = 1 +, 2 −, 3 +3.. Decay branching ratios into (Kππ), Kϱ, K ∗(890)π and K ∗(1420)π are also obtained for both resonances, as well as their production cross sections. Arguments are given to prove that the isospin of both resonances is I = 1 2 . All the results are consistent with the interpretation that these resonances are produced by Pomeron exchange. A quark-model speculation leads to a classification of the L-meson as belonging to a nonet with C = −1, probably 3D 2 or 1F 3 in spectroscopic notation.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call