Publication Date:
1995
abstract:
The results of the analysis of 3940 (KKsr)wr events from a sample of 18 millions p annihilations in the liquid
hydrogen target of the OBELIX spectrometer at LEAR (CERN) are presented. The presence of two pseudoscalar states at
1.416+-0.002 GeV/c2, with width 0.050f0.004GeV/c2, andat 1.46+-0.01 GeV/c2, with width 0.105+-0.015 GeV/c2, is established. The lighter mass resonance decays mainly to Ki?n, possibly with final state interactions and a small contribution
coming from mr. The higher mass O-+ state, which is seen for the first time in pp annihilation at rest, decays only to
K*J?. Masses, widths and decay modes are in agreement with the analysis of J/psi radiative decay performed by the Mark
III Collaboration. From the fit the G-parity was determined to be +1. The dominant three-body decay mode of the lighter
pseudoscalar is observed for the first time in this measurement.
Iris type:
1.1 Articolo in rivista
List of contributors:
A., Bertina; M., Bruschia; B., Ceredaa; S., De Castroa; A., Ferrettia; D., Gallia; B., Giacobbe”; U., Marconi a; M., Poli ap*; M., Piccininia; N., Semprini Cesaria; R., Spighi a; S., Vecchi a; A., Vezzania; F., Vigottia; M., Villaa; A., Vitale a; A., Zoccoli a; M., Corradinib; A., Donzellab; E., Lodi Rizzini b; L., Venturelli b; A., Zenoni ‘; C., Cicalo d; A., Laid; A., Masoni d; L., Musad; G., Puddu d; S., Serci d; P. P., Temnikovd; G., Usai d; V. G., Ableeve; Denisov e, O. Y. u.; A. M., Rozhdestvensky e; M. G., Sapozhnikove; V. I., Tretyake; P., Gianottif; C., Guaraldof; A., Lanaro f; V., Lucherini f; F., Nichitiu f; L, ; C., Petrascu f**; A., Rosca’V’; C., Cavions; U., Gastaldi g; G., Marona; M., Morando h; G., Bendiscioli; V., Filippini; Fontana, Andrea; Montagna, PAOLO MARIA; Rotondi, Alberto; A., Saino; P., Salvini; F., Balestraj; E., Bottaj; T., Bressanij; M. P., Bussa j; L., Bussoj; D., Calvjo; Cerelloj, P.; S., Costal; A., Felicielloj; L., Ferreroj; A., Filippij; R., Garfagnini’ J; A., Grassoj; A., Maggiora j; S., Marcelloj; N., Mirfakhraij; 2, ; D., Panzierij; D., Parenaj; E., Rossettoj; F., Toselloj; G., Zosij; M., Agnellok; F., Iazzi k; B., Minettik; G., Paulit; S., Tessaroe; L., Santi
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