Measurement of the $e^{+}e^{-}\to\Sigma^{0}\bar{\Sigma}^{0}$ cross sections at center-of-mass energies from $2.3864$ to $3.0200$ GeV

TL;DR

This paper reports precise measurements of the e+e- to Sigma0 anti-Sigma0 cross sections across a range of energies, using innovative methods to improve accuracy and providing valuable data for testing theoretical models.

Contribution

It introduces a novel reconstruction technique for near-threshold energies and offers the most precise cross section measurements to date for this process.

Findings

Measured cross sections are consistent with previous results from BaBar.

The cross-section lineshape fits well with a perturbative QCD energy function.

Effective form factors of Sigma0 are extracted with high precision.

Abstract

The Born cross sections of $e^{+}e^{-}\to \Sigma^{0}\bar{\Sigma}^{0}$ are measured at center-of-mass energies from $2.3864$ to $3.0200$ GeV using data samples with an integrated luminosity of $328.5$ pb$^{-1}$ collected with the BESIII detector operating at the BEPCII collider. The analysis makes use of a novel reconstruction method for energies near production threshold, while a single-tag method is employed at other center-of-mass energies. The measured cross sections are consistent with earlier results from BaBar, with a substantially improved precision. The cross-section lineshape can be well described by a perturbative QCD-driven energy function. In addition, the effective form factors of the $\Sigma^{0}$ baryon are determined. The results provide precise experimental input for testing various theoretical predictions.