Physics Letters B (Jun 2025)

High precision X-ray spectroscopy of kaonic neon

  • F. Sgaramella,
  • D. Sirghi,
  • K. Toho,
  • F. Clozza,
  • L. Abbene,
  • C. Amsler,
  • F. Artibani,
  • M. Bazzi,
  • G. Borghi,
  • D. Bosnar,
  • M. Bragadireanu,
  • A. Buttacavoli,
  • M. Cargnelli,
  • M. Carminati,
  • A. Clozza,
  • R. Del Grande,
  • L. De Paolis,
  • K. Dulski,
  • L. Fabbietti,
  • C. Fiorini,
  • I. Friščić,
  • C. Guaraldo,
  • M. Iliescu,
  • M. Iwasaki,
  • A. Khreptak,
  • S. Manti,
  • J. Marton,
  • P. Moskal,
  • F. Napolitano,
  • S. Niedźwiecki,
  • H. Ohnishi,
  • K. Piscicchia,
  • F. Principato,
  • A. Scordo,
  • M. Silarski,
  • F. Sirghi,
  • M. Skurzok,
  • A. Spallone,
  • L.G. Toscano,
  • M. Tüchler,
  • O. Vazquez Doce,
  • E. Widmann,
  • J. Zmeskal,
  • C. Curceanu

Journal volume & issue
Vol. 865
p. 139492

Abstract

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The high-precision kaonic neon X-ray transitions measurement performed by the SIDDHARTA-2 collaboration at the DAΦNE collider is reported. Both the X-ray energies and yields for high-n transitions were measured, demonstrating the feasibility of sub-eV X-ray 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.

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