Data di Pubblicazione:
1995
Abstract:
The results of the analysis of 3940 (K (K) over bar pi)pi pi events from a sample of 18 millions (p) over bar 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/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 K (K) over bar pi, possibly with final state interactions and a small contribution coming from a(0) pi. The higher mass 0(-+) state, which is seen for the first time in (p) over bar p annihilation at rest, decays only to K+(K) over bar. 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.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
A. BERTIN;M. BRUSCHI;B. CEREDA;S. DECASTRO;A. FERRETTI;D. GALLI;B. GIACOBBE;U. MARCONI;M. POLI;M. PICCININI;N. SEMPRINICESARI;R. SPIGHI;S. VECCHI;A. VEZZANI;F. VIGOTTI;M. VILLA;A. VITALE;A. ZOCCOLI;M. CORRADINI;A. DONZELLA;E. L. RIZZINI;L. VENTURELLI;A. ZENONI;C. CICALO;A. LAI;A. MASONI;L. MUSA;G. PUDDU;S. SERCI;P. P. TEMNIKOV;G. USAI;V. G. ABLEEV;O. Y. DENISOV;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;M. AGNELLO;F. IAZZI;B. MINETTI;G. PAULI;S. TESSARO;L. SANTI
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