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., B., M., B., M., C., B., C., S., D., A., F., D., G., B., G., U., M., M., P., N., S., R., S., S., V., A., V., F., V., M., V., A., V., A., Z., G., B., M., C., et al.. - In: PHYSICS OF ATOMIC NUCLEI. - ISSN 1063-7788. - 59:(1996), pp. 1312-1318. (3rd International Conference on Nucleon-Antinucleon Physics Moscow (RUS) 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.
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https://hdl.handle.net/11583/1845581
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