E IOTA DECAYS TO K(K)OVER-BAR-PI IN (P)OVER-BARP ANNIHILATION AT REST/

Authors
BERTIN A BRUSCHI M CEREDA B DECASTRO S FERRETTI A GALLI D GIACOBBE B MARCONI U POLI M PICCININI M SEMPRINICESARI N SPIGHI R VECCHI S VEZZANI A VIGOTTI F VILLA M VITALE A ZOCCOLI A CORRADINI M DONZELLA A RIZZINI EL VENTURELLI L ZENONI A CICALO C LAI A MASONI A MUSA L PUDDU G SERCI S TEMNIKOV PP USAI G ABLEEV VG DENISOV OY ROZHDESTVENSKY AM SAPOZHNIKOV MG TRETYAK VI GIANOTTI P GUARALDO C LANARO A LUCHERINI V NICHITIU F PETRASCU C ROSCA A CAVION C GASTALDI U MARON G MORANDO M BENDISCIOLI G FILIPPINI V FONTANA A MONTAGNA P ROTONDI A SAINO A SALVINI P BALESTRA F BOTTA E BRESSANI T BUSSA MP BUSSO L CALVO D CERELLO P COSTA S FELICIELLO A FERRERO L FILIPPI A GARFAGNINI R GRASSO A MAGGIORA A MARCELLO S MIRFAKHRAI N PANZIERI D PARENA D ROSSETTO E TOSELLO F ZOSI G AGNELLO M IAZZI F MINETTI B PAULI G TESSARO S SANTI L
Citation
A. Bertin et al., E IOTA DECAYS TO K(K)OVER-BAR-PI IN (P)OVER-BARP ANNIHILATION AT REST/, Physics letters. Section B, 361(1-4), 1995, pp. 187-198
Citations number
47
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
361
Issue
1-4
Year of publication
1995
Pages
187 - 198
Database
ISI
SICI code
0370-2693(1995)361:1-4<187:EIDTKI>2.0.ZU;2-X
Abstract
The results of the analysis of 3940 (K (K) over bar pi)pi pi events fr om a sample of 18 millions (p) over bar p annihilations in the liquid hydrogen target of the OBELIX spectrometer at LEAR (CERN) are presente d. 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 stat e interactions and a small contribution coming from a(0) pi. The highe r 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 a nd decay modes are in agreement with the analysis of J/psi radiative d ecay performed by the Mark III Collaboration. From the fit the G-parit y was determined to be +1. The dominant three-body decay mode of the l ighter pseudoscalar is observed for the first time in this measurement .