Determination of the relative phase in ψ' and J/ψ decays into baryon and antibaryon

Abstract

With the recent measurements of psi' and J/psi decay into octet-baryon pairs, we study the relative phase between the strong and the electromagnetic amplitudes, and find a large phase by fitting the present data. The fits take into account the details of experimental effects, including energy spread and initial state radiation. We also predict some branching fractions of psi' decays and the continuum production rates at the J/psi mass based on the relative phase and absolute amplitudes obtained from the fits.

13 pages

References in corpus (1)

• Measurements of psi(2S) decays to octet baryon-antibaryon pairs

Cited by in corpus (16)

• Strong and electromagnetic amplitudes of the $J/\psi$ decays into baryons and their relative phase
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• Measurements of the branching fractions of $\psi (3686)\to {\bar{\Sigma }}^0\Lambda +c.c.$ and ${\chi }_{cJ(J=0,1,2)}\to \Lambda \bar{\Lambda }$
• Measurement of the phase between strong and electromagnetic amplitudes of $J/\psi$ decays
• A model to explain angular distributions of $J/\psi$ and $\psi (2S)$ decays into $\Lambda \overline{\Lambda }$ and ${\Sigma }^0{\overline{\Sigma }}^0$
• Observation of the $J/\psi$ and $\psi (3686)$ decays into $\eta {\Sigma }^{+}{\bar{\Sigma }}^{-}$
• Symmetry analysis of charmonium decays to two-baryon final state
• Amplitudes separation and strong-electromagnetic relative phase in the $\psi (2S)$ decays into baryons
• Measurement of Branching Fractions of $J/\psi$ and $\psi (3686)$ decays to ${\Sigma }^{+}$ and ${\overline{\Sigma }}^{-}$
• Symmetry analysis of charmonium two-body decay
• Baryon decays $J/\psi \to B\bar{B}$ within the QCD factorisation framework
• Observation of the $\psi (3686)$ decays into ${\Sigma }^{+}{\bar{\Sigma }}^{-}\omega$ and ${\Sigma }^{+}{\bar{\Sigma }}^{-}\varphi$
• Observation of the decay $\psi (3686)\to {\Sigma }^{-}{\bar{\Sigma }}^{+}$ and measurement of its angular distribution
• Analytical formula for the cross section of hadron production from $e^{+}{e}^{-}$ collisions around the narrow charmouinum resonances
• Isospin violating decays of vector charmonia