Archivio Istituzionale della RicercaThe results of the analysis of 3940 (KK̄π)ππ events from a sample of 18 millions p̄p 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/c 2, with width 0.050 ± 0.004 GeV/c 2, and at 1.46 ± 0.01 GeV/c 2, with width 0.105 ± 0.015 GeV/c 2, is established. The lighter mass resonance decays mainly to KK̄π, possibly with final state interactions and a small contribution coming from a 0π. The higher mass 0 -+ state, which is seen for the first time in p̄p annihilation at rest, decays only to K*K̄. Masses, widths and decay modes are in agreement with the analysis of J/ψ 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.
E/ι decays to KK-π in anti-p p annihilation at rest / A., Bertin; M., Bruschi; B., Cereda; S., De Castro; A., Ferretti; D., Galli; B., Giacobbe; U., Marconi; M., Poli; M., Piccinini; N., Semprini Cesari; R., Spighi; S., Vecchi; A., Vezzani; F., Vigotti; M., Villa; A., Vitale; A., Zoccoli; M., Corradini; A., Donzella; E., Lodi Rizzini; L., Venturelli; A., Zenoni; C., Cicaló; A., Lai; A., Masoni; L., Musa; G., Puddu; S., Serci; P. P., Temnikov; G., Usai; V. G., Ableev; Denisov, O. Y. u.; A. M., Rozhdestvensky; M. G., Sapozhnikov; V. I., Tretyak; P., Gianotti; C., Guaraldo; A., Lanaro; V., Lucherini; F., Nichitiu; C., Petrascu; A., Rosca; C., Cavion; U., Gastaldi; G., Maron; M., Morando; G., Bendiscioli; V., Filippini; A., Fontana; P., Montagna; A., Rotondi; A., Saino; P., Salvini; F., Balestra; E., Botta; T., Bressani; M. P., Bussa; L., Busso; D., Calvo; P., Cerello; S., Costa; A., Feliciello; L., Ferrero; A., Filippi; R., Garfagnini; A., Grasso; A., Maggiora; S., Marcello; N., Mirfakhrai; D., Panzieri; D., Parena; E., Rossetto; F., Tosello; G., Zosi; Agnello, Michelangelo; Iazzi, Felice; Minetti, Bruno; G., Pauli; S., Tessaro; L., Santi. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 361:1-4(1995), pp. 187-198. [10.1016/0370-2693(95)01136-E]
E/ι decays to KK-π in anti-p p annihilation at rest
AGNELLO, MICHELANGELO;IAZZI, Felice;MINETTI, Bruno;
1995
Abstract
The results of the analysis of 3940 (KK̄π)ππ events from a sample of 18 millions p̄p 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/c 2, with width 0.050 ± 0.004 GeV/c 2, and at 1.46 ± 0.01 GeV/c 2, with width 0.105 ± 0.015 GeV/c 2, is established. The lighter mass resonance decays mainly to KK̄π, possibly with final state interactions and a small contribution coming from a 0π. The higher mass 0 -+ state, which is seen for the first time in p̄p annihilation at rest, decays only to K*K̄. Masses, widths and decay modes are in agreement with the analysis of J/ψ 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.
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https://hdl.handle.net/11583/1845574
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