Recent results on hyperon pair production and nucleon time-like form factors at BESIII

TL;DR

This paper presents recent high-precision measurements of nucleon time-like form factors and hyperon pair production at BESIII, advancing understanding of baryon structure through electron-positron collision experiments.

Contribution

It reports new experimental results on nucleon form factors and hyperon production using innovative techniques at BESIII, providing valuable data for baryon structure studies.

Findings

Precise measurements of $e^+e^- o p ar{p}$ and $e^+e^- o n ar{n}$ processes.

Observation of $ ext{Sigma}$ polarization in $e^+e^- o J/ ext{psi} o ext{Sigma}^+ ar{ ext{Sigma}}^-$.

Enhanced understanding of nucleon and hyperon electromagnetic form factors.

Abstract

The BESIII experiment, based on the BEPCII collider at IHEP in Beijing, China, is capable of measuring nucleon form factors with unprecedented precision. We report recent results achieved by the BESIII collaboration concerning the nucleon time-like form factors and the hyperon pair production. More in detail we outline the results obtained by the study of the process $e^+e^- \to p \overline p$, using both the scan-energy and initial-state radiation techniques, those of the process $e^+e^- \to n \overline n$, and the study of the $\Sigma$ polarization regarding the process $e^+e^- \to J/\psi \to \Sigma^+\overline \Sigma{}^-$.