Precision Test of Bound-State QED at Intermediate-Z with Kaonic Neon

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

arXiv · 2508.08161

Precision Test of Bound-State QED at Intermediate-Z with Kaonic Neon

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Abstract

We report Dirac-Fock calculations of transition energies for kaonic neon (KNe). For the most intense line, the 7-6 transition, the calculated energy is 9450.28 eV, which includes a bound-state QED (BSQED) contribution of 12.66 eV. This is in excellent agreement with the recent SIDDHARTHA-2 measurement at DA$\Phi$NE of 9450.23 $\pm$ 0.37 (stat.) $\pm$ 1.50 (syst.) eV. With the QED shift far exceeding experimental uncertainty, these results establish kaonic atoms as powerful platforms for precision tests of BSQED in intermediate-Z systems.

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S. Manti, F. Sgaramella, L. Abbene, C. Amsler, F. Artibani, M. Bazzi, G. Borghi, D. Bosnar, M. Bragadireanu, A. Buttacavoli, M. Carminati, A. Clozza, F. Clozza, R. Del Grande, L. De Paolis, K. Dulski, L. Fabbietti, C. Fiorini, I. Friščić, C. Guaraldo, M. Iliescu, P. Indelicato, M. Iwasaki, A. Khreptak, J. Marton, P. Moskal, F. Napolitano, S. Niedźwiecki, H. Ohnishi, K. Piscicchia, F. Principato, A. Scordo, M. Silarski, D. Sirghi, F. Sirghi, M. Skurzok, A. Spallone, J. Sommerfeldt, L. G. Toscano, K. Toho, O. Vazquez Doce, J. Zmeskal, C. Curceanu. 2025-08-11. Precision Test of Bound-State QED at Intermediate-Z with Kaonic Neon. https://arxiv.org/abs/2508.08161

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