Archivio Istituzionale della RicercaThe 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 anti-K.K.pi in the reaction anti-p.p -> E/i.pi.pi / 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., Cicalò; 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., D'Isep; 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; Agnello, Michelangelo; Iazzi, Felice; Minetti, Bruno; G., Pauli; G. V., Margagliotti; S., Tessaro; L., Santi. - In: PHYSICS OF ATOMIC NUCLEI. - ISSN 1063-7788. - 59:(1996), pp. 1312-1318. (Intervento presentato al convegno 3rd International Conference on Nucleon-Antinucleon Physics tenutosi a Moscow (RUS) nel Sep. 11-16, 1995).
Study of E/i decays into anti-K.K.pi in the reaction anti-p.p -> E/i.pi.pi
AGNELLO, MICHELANGELO;IAZZI, Felice;MINETTI, Bruno;
1996
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.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/11583/1845581
Attenzione
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo