Kaonic Atom X-ray Spectroscopy: From SIDDHARTA-2 to the EXKALIBUR Program
Abstract
X-ray spectroscopy of kaonic atoms offers a unique experimental window on the interplay between low-energy strong interaction and precision atomic physics studies. This article reviews the scientific progress achieved with SIDDHARTA-2 at DAFNE and discusses how it shapes the next generation measurements. Particular emphasis is given to EXKALIBUR, a multifacility program designed to perform measurements of kaon-nucleus interactions across the periodic table and to extend kaonic atom spectroscopy toward precision tests of bound-state QED and the charged-kaon mass extraction. The first proposed strong interaction campaign at J-PARC aims to investigate kaonic atoms with solid Li, Be, and B targets using new 1-mm-thick Silicon Drift Detectors and high-resolution TES microcalorimeters, exploiting isotope pairs to isolate nuclear-structure and kaon-multinucleon effects. Measurements of Mg, Al, Si, and S with CdZnTe detectors will broaden this study toward heavier nuclei. EXKALIBUR will establish a systematic experimental framework for testing low-energy strong interaction with strangeness and bound-state QED predictions across a broad range of kaonic atoms.
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BibTeX
@misc{sgaramella2026kaonic,
title = {{Kaonic Atom X-ray Spectroscopy: From SIDDHARTA-2 to the EXKALIBUR Program}},
author = {F. Sgaramella and L. Abbene and F. Artibani and M. Bazzi and G. Borghi and D. Bosnar and M. Bragadireanu and A. Buttacavoli and A. Clozza and F. Clozza and R. Del Grande and L. De Paolis and K. Dulski and C. Fiorini and I. Friščić and C. Guaraldo and T. Hashimoto and M. A. Iliescu and M. Iwasaki and A. Khreptak and S. Manti and J. Marton and P. Moskal and H. Ohnishi and F. Principato and A. Scordo and M. Silarski and D. Sirghi and F. Sirghi and M. Skurzok and A. Spallone and K. Toho and J. Zmeskal and C. Curceanu},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.07865},
eprint = {2610.07865},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.07865},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Kaonic Atom X-ray Spectroscopy: From SIDDHARTA-2 to the EXKALIBUR Program
AU - F. Sgaramella
AU - L. Abbene
AU - F. Artibani
AU - M. Bazzi
AU - G. Borghi
AU - D. Bosnar
AU - M. Bragadireanu
AU - A. Buttacavoli
AU - A. Clozza
AU - F. Clozza
AU - R. Del Grande
AU - L. De Paolis
AU - K. Dulski
AU - C. Fiorini
AU - I. Friščić
AU - C. Guaraldo
AU - T. Hashimoto
AU - M. A. Iliescu
AU - M. Iwasaki
AU - A. Khreptak
AU - S. Manti
AU - J. Marton
AU - P. Moskal
AU - H. Ohnishi
AU - F. Principato
AU - A. Scordo
AU - M. Silarski
AU - D. Sirghi
AU - F. Sirghi
AU - M. Skurzok
AU - A. Spallone
AU - K. Toho
AU - J. Zmeskal
AU - C. Curceanu
PY - 2026
DA - 2026/10/06
PB - arXiv
DO - 10.48550/arxiv.2610.07865
UR - https://arxiv.org/abs/2610.07865
AB - X-ray spectroscopy of kaonic atoms offers a unique experimental window on the interplay between low-energy strong interaction and precision atomic physics studies. This article reviews the scientific progress achieved with SIDDHARTA-2 at DAFNE and discusses how it shapes the next generation measurements. Particular emphasis is given to EXKALIBUR, a multifacility program designed to perform measurements of kaon-nucleus interactions across the periodic table and to extend kaonic atom spectroscopy toward precision tests of bound-state QED and the charged-kaon mass extraction. The first proposed strong interaction campaign at J-PARC aims to investigate kaonic atoms with solid Li, Be, and B targets using new 1-mm-thick Silicon Drift Detectors and high-resolution TES microcalorimeters, exploiting isotope pairs to isolate nuclear-structure and kaon-multinucleon effects. Measurements of Mg, Al, Si, and S with CdZnTe detectors will broaden this study toward heavier nuclei. EXKALIBUR will establish a systematic experimental framework for testing low-energy strong interaction with strangeness and bound-state QED predictions across a broad range of kaonic atoms.
ER -