Observation of p pbar pi^0 and p pbar eta in psi' decays

Abstract

The processes psi'-->p pbar pi^0 and psi'-->p pbar eta are studied using a sample of 14 million psi' decays collected with the Beijing Spectrometer at the Beijing Electron-Positron Collider. The branching fraction of psi'-->p pbar pi^0 is measured with improved precision as (13.2\pm 1.0\pm 1.5)\times 10^{-5}, and psi'-->p pbar eta is observed for the first time with a branching fraction of (5.8\pm 1.1\pm 0.7)\times 10^{-5}, where the first errors are statistical and the second ones are systematic.

15 pages, 8 figures and 3 tables

References in corpus (5)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Measurement of the Branching Fraction of J/psi --> pi+ pi- pi0
• Measurements of $\psi (2S)$ decays into Vector- Tensor final states
• Possible large branching fraction of psi(3770) decays to charmless final states
• Determination of BR(chi_{cJ} --> p \bar{p}) in psi(2S) decays

Cited by in corpus (18)

• Heavy quarkonium: progress, puzzles, and opportunities
• Progress Toward Understanding Baryon Resonances
• Study of psi(2S) Decays to gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} and Search for p bar{p} Threshold Enhancements
• Baryonia and near-threshold enhancements
• Charmonium production in p pbar annihilation: Estimating cross sections from decay widths
• Measurement of $\psip$ Radiative Decays
• First measurements of J/Psi decays into ${\Sigma }^{+}{\bar{\Sigma }}^{-}$ and ${\Xi }^0{\bar{\Xi }}^0$
• Theoretical study on pp --> p n pi+ reaction at medium energies
• Partial wave analysis of $\psi (2S)\to p\bar{p}\eta$
• Associated Charmonium Production in Low Energy p-pbar Annihilation
• Spectroscopy of ${\mathrm{q}}^3{\bar{\mathrm{q}}}^3$-States in Quark Model and Baryon-Antibaryon Enhancements
• Baryon Antibaryon Nonets
• First observation of $\psi (2S)\to p\bar{n}{\pi }^{-}+c.c.$
• Meson Emission Model of Psi to N Nbar m Charmonium Strong Decays
• Measurements of $\psip$ decays into $\gamma K\bar{K}\pi$ and $γη\pipi$
• Experimental study of $\psi (2S)$ decays to $\K^+ K^- π^+ π^- π^0$ final states
• Observation of the $J/\psi$ and $\psi (3686)$ decays into $\eta {\Sigma }^{+}{\bar{\Sigma }}^{-}$
• Measurements of $J/\psi$ and $\psi (2S)$ decays into $\Lambda \bar{\Lambda }{\pi }^0$ and $\Lambda \bar{\Lambda }\eta$