High precision X-ray spectroscopy of kaonic neon

TL;DR

This paper reports high-precision measurements of kaonic neon X-ray transitions, demonstrating the feasibility of sub-eV spectroscopy for kaonic atoms and providing data to refine theoretical models and test QED in strange exotic atoms.

Contribution

It presents the first high-precision X-ray spectroscopy of kaonic neon, advancing experimental techniques and providing new data for theoretical and QED studies.

Findings

Successful measurement of X-ray energies and yields for kaonic neon

Demonstration of sub-eV resolution in low-Z gaseous targets

Insights into de-excitation processes in kaonic atoms

Abstract

The high-precision kaonic neon X-ray transitions measurement performed by the SIDDHARTA-2 collaboration at the DA$\Phi$NE collider is reported. Both the X-ray energies and yields for high-n transitions were measured, demonstrating the feasibility of sub-eV Xray spectroscopy for kaonic atoms using low-Z gaseous targets. The measurement provides valuable insights into the de-excitation processes in kaonic atoms, providing new input data for the refinement of the corresponding theoretical models, and a framework for testing Quantum Electrodynamics in strange exotic atoms.