Archivio Istituzionale della RicercaThe results of the analysis of 3940 (KK̄π)ππ events from a sample of 18 millions p̄p annihilations in the liquid hydrogen target of the OBELIX spectrometer at LEAR (CERN) are presented. 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 KK̄π, possibly with final state interactions and a small contribution coming from a 0π. The higher mass 0 -+ state, which is seen for the first time in p̄p annihilation at rest, decays only to K*K̄. Masses, widths and decay modes are in agreement with the analysis of J/ψ radiative decay performed by the Mark III Collaboration. From the fit the G-parity was determined to be +1. The dominant three-body decay mode of the lighter pseudoscalar is observed for the first time in this measurement.
E/ι decays to KK-π in anti-p p annihilation at rest / A., B., M., B., B., C., S., D.C., A., F., D., G., B., G., U., M., M., P., M., P., N., S.C., R., S., S., V., A., V., F., V., M., V., A., V., A., Z., M., C., A., D., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 361:1-4(1995), pp. 187-198. [10.1016/0370-2693(95)01136-E]
E/ι decays to KK-π in anti-p p annihilation at rest
AGNELLO, MICHELANGELO;IAZZI, Felice;MINETTI, Bruno;
1995
Abstract
The results of the analysis of 3940 (KK̄π)ππ events from a sample of 18 millions p̄p annihilations in the liquid hydrogen target of the OBELIX spectrometer at LEAR (CERN) are presented. 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 KK̄π, possibly with final state interactions and a small contribution coming from a 0π. The higher mass 0 -+ state, which is seen for the first time in p̄p annihilation at rest, decays only to K*K̄. Masses, widths and decay modes are in agreement with the analysis of J/ψ radiative decay performed by the Mark III Collaboration. From the fit the G-parity was determined to be +1. The dominant three-body decay mode of the lighter pseudoscalar is observed for the first time in this measurement.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/11583/1845574
Attenzione
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo