Hyperon-Nucleus/Nucleon Scattering at BESIII

TL;DR

This paper reports on measuring hyperon-nucleus and hyperon-nucleon scattering cross sections at BESIII using decay data, introducing a novel method that advances hyperon interaction studies relevant to strong force and neutron star research.

Contribution

It presents a new experimental approach to measure hyperon interactions at BESIII, enabling detailed studies of strong force and baryon interactions in dense matter.

Findings

First measurements of hyperon-nucleus cross sections at BESIII.

Development of a novel scattering measurement method.

Insights into hyperon interactions relevant to neutron star physics.

Abstract

Utilizing the large quantity of hyperons and antihyperons produced by the decay of 10 billion $J/\psi$ and 2.7 billion $\psi(3686)$ collected at BESIII, the cross sections of several specific elastic or inelastic (anti-)hyperon-nucleus/nucleon rections have been measured via the scattering between the (anti-)hyperons and the nucleus in the dense objects of BESIII detector. The novel method developed in these works extends the research field and opens a new era for the experiments at $e^+ e^-$ colliders. The results of such measurements will definitely benefit a lot the precise probe of the (anti-)hyperon-nucleus/nucleon interactions and provide constraints for the studies of the potential of strong interaction, the origin of color confinement, the unified model for baryon-baryon interactions, and the internal structure of neutron stars. The desirable prospects of corresponding studies in the future Super Tau-Charm Factory (STCF) are also discussed in this report.