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STUDY OF E I DECAYS INTO K(K)OVER-BAR-PI IN THE REACTION (P)OVER-BAR-P-]E/I-PI-PI/

Authors

BERTIN A BRUSCHI M CAPPONI M CEREDA B DECASTRO S FERRETTI A GALLI D GIACOBBE B MARCONI U PICCININI M SEMPRINICESARI N SPIGHI R VECCHIA S VEZZANI A VIGOTTI F VILLA M VITALE A ZOCCOLI A BELLI G CORRADINI M DONZELLA A LODIRIZZINI E VENTURELLI L ZENONI A CICALO C MASONI A PUDDU G SERCI S TEMNIKOV P USAI G DENISOV OY GORCHAKOV OE PRAKHOV SN ROZHDESTVENSKY AM SAPOZHNIKOV MG TRETYAK VI POLI M GIANOTTI P GUARALDO C LANARO A LUCHERINI V NICHITIU F PETRASCU C ROSCA A ABLEEV VG CAVION C GASTALDI U LOMBARDI M MARON G VANNUCCI L VEDOVATO G ANDRIGHETTO A MORANDO M RICCI RA BENDISCIOLI G FILIPPINI V FONTANA A MONTAGNA P ROTONDI A SAINO A SALVINI P FILIPPI A BALESTRA F BOTTA E BRESSANI T BUSSA MP BUSSO L CALVO D CERELLO P COSTA S DISEP F FAVA L FELICIELLO A FERRERO L GARFAGNINI R GRASSO A MAGGIORA A MARCELLO S MIRFAKHRAEE N PANZIERI D PARENA D ROSSETTO E TOSELLO F ZOSI G AGNELLO M IAZZI F MINETTI B PAULI G MARGAGLIOTTI GV TESSARO S SANTI L

Citation

A. Bertin et al., STUDY OF E I DECAYS INTO K(K)OVER-BAR-PI IN THE REACTION (P)OVER-BAR-P-]E/I-PI-PI/, Physics of atomic nuclei, 59(8), 1996, pp. 1312-1318

Citations number

Categorie Soggetti

Physics, Nuclear","Physics, Particles & Fields

Journal title

Physics of atomic nuclei → ACNP

ISSN journal

10637788

Volume

Issue

Year of publication

1996

Pages

1312 - 1318

Database

ISI

SICI code

1063-7788(1996)59:8<1312:SOEIDI>2.0.ZU;2-2

Abstract

The results of the preliminary analysis of 4840 (K (K) over bar pi)pi pi events, from a data sample of 24 million (p) over bar p annihilatio ns at rest in a gaseous hydrogen target at NTP, collected with the OBE LIX spectrometer at LEAR (CERN), are presented. The presence of two ps eudoscalar states in the region around 140 MeV/c(2), already seen, for the first time, in (p) over bar p annihilations at rest from analysis of a data set taken with a liquid hydrogen target, is confirmed, The lighter mass resonance decays mainly into K (K) over bar pi, while the higher mass 0(-+) state decays only into K(K) over bar. A sizable fr action of direct K(K) over bar production, from the initial P-wave pr otonium state (about twice the value in liquid hydrogen), is observed, as expected. No significant evidence for an axial vector emerges from this preliminary analysis.