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Based on the recently precise measurements of the electron-positronannihilation reactions into a neutron and anti-neutron pair by BESIIIcollaboration, the effective form factor of neutron was determined in the timelike region, and it was found that the effective form factor of neutron issmaller than the ones of proton. The effective form factors of neutron shows aperiodic behaviour, similar to the case of proton. Here, a compared analysisfor $\Lambda$, $\Sigma^0$ and $\Xi^0$ is performed. Fits of the available dataon the effective form factors of $\Lambda$, $\Sigma^0$ and $\Xi^0$ with chargezero, allow to show a universal phenomenon of the oscillation behavior in theireffective form factors. However, this needs to be confirmed by future preciseexperiments. Both theoretical and experimental investigations of thisphenomenon can shed light on the reaction mechanisms of the electron-positronannihilation process.

Electromagnetic form factors of neutron and neutral stange hyperons in the oscillating view of point