Spin and Parity Analysis of K K ¯ π System in the D and <mml…
1985; American Physical Society; Volume: 55; Issue: 8 Linguagem: Inglês
10.1103/physrevlett.55.779
ISSN1092-0145
AutoresS. U. Chung, R. Fernow, H. Kirk, S. Protopopescu, D. P. Weygand, D. Boehnlein, J. H. Goldman, V. Hagopian, D. Reeves, R.R. Crittenden, A. Dzierba, T. Marshall, S. Teige, D. Ziemińska, Z. Bar‐Yam, J. Dowd, W. Kern, H. Rudnicka,
Tópico(s)Particle physics theoretical and experimental studies
ResumoWe have performed a high-statistics experiment on the reaction ${\ensuremath{\pi}}^{\ensuremath{-}}p\ensuremath{\rightarrow}{K}^{+}{\overline{K}}^{0}{\ensuremath{\pi}}^{\ensuremath{-}}n$ at 8.0 GeV/c. A Dalitz-plot analysis of the ${K}^{+}{\overline{K}}^{0}{\ensuremath{\pi}}^{\ensuremath{-}}$ system finds that the $D(1285)$ is a ${J}^{\mathrm{PG}}={1}^{++}$ state coupling predominantly to a $\ensuremath{\delta}\ensuremath{\pi}$ decay channel, while the $E(1420)$ peak consists mostly of a ${J}^{\mathrm{PG}}={0}^{\ensuremath{-}+}$ wave with a substantial $\ensuremath{\delta}\ensuremath{\pi}$ decay mode. There is little evidence of a ${1}^{++}$ resonance at the $E$ mass.
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