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 annihilations at rest in a gaseous hydrogen target at NTP, collected with the OBELIX spectrometer at LEAR (CERN), are presented. The presence of two pseudoscalar 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 fraction of direct K*(K) over bar production, from the initial P-wave protonium state (about twice the value in liquid hydrogen), is observed, as expected. No significant evidence for an axial vector emerges from this preliminary analysis.

Study of E/i decays into K(K)over-bar pi in the reaction (p)over-bar-p->E/i pi pi

BALESTRA, Ferruccio;BOTTA, Elena;BRESSANI, Tullio;BUSSA, Maria Pia;BUSSO, Luigi;COSTA, Sergio;FERRERO, Livio;GARFAGNINI, Raffaello;GRASSO, Antonino;MARCELLO, Simonetta;PANZIERI, Daniele;ZOSI, Gianfranco;
1996-01-01

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 annihilations at rest in a gaseous hydrogen target at NTP, collected with the OBELIX spectrometer at LEAR (CERN), are presented. The presence of two pseudoscalar 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 fraction of direct K*(K) over bar production, from the initial P-wave protonium state (about twice the value in liquid hydrogen), is observed, as expected. No significant evidence for an axial vector emerges from this preliminary analysis.
1996
59
1312
1318
A. Bertin;M. Bruschi;M. Capponi;B. Cereda;S. DeCastro;A. Ferretti;D. Galli;B. Giacobbe;U. Marconi;M. Piccinini;N. SempriniCesari;R. Spighi;S. Vecchia;A. Vezzani;F. Vigotti;M. Villa;A. Vitale;A. Zoccoli;G. Belli;M. Corradini;A. Donzella;E. LodiRizzini;L. Venturelli;A. Zenoni;C. Cicalo;A. Masoni;G. Puddu;S. Serci;P. Temnikov;G. Usai;O. Y. Denisov;O. E. Gorchakov;S. N. Prakhov;A. M. Rozhdestvensky;M. G. Sapozhnikov;V. I. Tretyak;M. Poli;P. Gianotti;C. Guaraldo;A. Lanaro;V. Lucherini;F. Nichitiu;C. Petrascu;A. Rosca;V. G. Ableev;C. Cavion;U. Gastaldi;M. Lombardi;G. Maron;L. Vannucci;G. Vedovato;A. Andrighetto;M. Morando;R. A. Ricci;G. Bendiscioli;V. Filippini;A. Fontana;P. Montagna;A. Rotondi;A. Saino;P. Salvini;A. Filippi;F. Balestra;E. Botta;T. Bressani;M. P. Bussa;L. Busso;D. Calvo;P. Cerello;S. Costa;F. DIsep;L. Fava;A. Feliciello;L. Ferrero;R. Garfagnini;A. Grasso;A. Maggiora;S. Marcello;N. Mirfakhraee;D. Panzieri;D. Parena;E. Rossetto;F. Tosello;G. Zosi;M. Agnello;F. Iazzi;B. Minetti;G. Pauli;G. V. Margagliotti;S. Tessaro;L. Santi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/110068
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