Measurement of $\psi (2S)$ decays to baryon pairs

Abstract

A sample of 3.95M $\psi (2S)$ decays registered in the BES detector are used to study final states containing pairs of octet and decuplet baryons. We report branching fractions for $\psi (2S)\to p\bar{p}$, $\Lambda \bar{\Lambda }$, ${\Sigma }^0\bar{\Sigma }{}^0$, ${\Xi }^{-}\bar{\Xi }{}^{+}$, ${\Delta }^{++}\bar{\Delta }{}^{--}$, ${\Sigma }^{+}(1385)\bar{\Sigma }{}^{-}(1385)$, ${\Xi }^0(1530)\bar{\Xi }{}^0(1530)$, and ${\Omega }^{-}\bar{\Omega }{}^{+}$. These results are compared to expectations based on the SU(3)-flavor symmetry, factorization, and perturbative QCD.

22 pages, 21 figures, 4 tables

References in corpus (1)

• Determination of the J/psi Leptonic Branching Fraction via psi(2S) -> pi^+ pi^- J/psi

Cited by in corpus (9)

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• Branching Fraction Measurements of psi(2S) Decay to Baryon-Antibaryon Final States
• Measurements of psi(2S) decays to octet baryon-antibaryon pairs
• Determination of the relative phase in ψ' and J/ψ decays into baryon and antibaryon
• First measurements of J/Psi decays into ${\Sigma }^{+}{\bar{\Sigma }}^{-}$ and ${\Xi }^0{\bar{\Xi }}^0$
• Symmetry analysis of charmonium two-body decay
• Measurements of $J/\psi$ and $\psi (2S)$ decays into $\Lambda \bar{\Lambda }{\pi }^0$ and $\Lambda \bar{\Lambda }\eta$