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

TL;DR

This paper analyzes recent measurements of neutron and hyperon form factors, revealing a universal oscillation pattern in their effective form factors in the time-like region, which may inform understanding of electron-positron annihilation mechanisms.

Contribution

It identifies a universal oscillation behavior in the effective form factors of neutron and neutral hyperons, supported by data fits, suggesting a common underlying phenomenon.

Findings

Effective neutron form factor is smaller than proton's.

Neutron and hyperon form factors exhibit periodic oscillations.

Universal oscillation pattern observed across different neutral hyperons.

Abstract

Based on the recently precise measurements of the electron-positron annihilation reactions into a neutron and anti-neutron pair by BESIII collaboration, the effective form factor of neutron was determined in the time like region, and it was found that the effective form factor of neutron is smaller than the ones of proton. The effective form factors of neutron shows a periodic behaviour, similar to the case of proton. Here, a compared analysis for $\Lambda$, $\Sigma^0$ and $\Xi^0$ is performed. Fits of the available data on the effective form factors of $\Lambda$, $\Sigma^0$ and $\Xi^0$ with charge zero, allow to show a universal phenomenon of the oscillation behavior in their effective form factors. However, this needs to be confirmed by future precise experiments. Both theoretical and experimental investigations of this phenomenon can shed light on the reaction mechanisms of the electron-positron annihilation process.