Determination of BR(chi_{cJ} --> p \bar{p}) in psi(2S) decays

Abstract

The processes psi(2S) --> gamma chi_{cJ}, chi_{cJ} --> p pbar (J=0,1,2) are studied using a sample of 14X10^6 psi(2S) decays collected with the Beijing Spectrometer at the Beijing Electron-Positron Collider. Very clear chi_{c0}, chi_{c1} and chi_{c2} signals are observed, and the branching fractions BR(chi_{cJ} --> p pbar) (J=0,1,2) are determined to be (27.1^{+4.3}_{-3.9}\pm 4.7)X10^{-5}, (5.7^{+1.7}_{-1.5}\pm0.9)X10^{-5}, and (6.5^{+2.4}_{-2.1}\pm1.0)X10^{-5}, respectively, where the first errors are statistical and the second are systematic.

arXiv comment14 pages, 2 figures, RevTex 4

References in corpus (5)

• Colour Octet Contribution in Exclusive P-Wave Charmonium Decay into Octet and Decuplet Baryons
• Study of the P-wave charmonium state χ_{cJ} in ψ(2S) decays
• A Measurement of Psi(2S) Resonance Parameters
• On the Particle Data Group evaluation of Psi' and chi_c Branching Ratios
• First Evidence of Lambda Lambda-bar in χ_cJ Decays

Cited by in corpus (3)

• Observation of p pbar pi^0 and p pbar eta in psi' decays
• Measurements of $J/\psi$ and $\psi (2S)$ decays into $\Lambda \bar{\Lambda }{\pi }^0$ and $\Lambda \bar{\Lambda }\eta$
• Hadronic decays of charmonia from BESII