Kaonic atoms, where a negatively charged kaon replaces an electron, provide a unique system for precision studies of bound-state and strong-field quantum electrodynamics (QED). The SIDDHARTA-2 experiment at the DAΦNE at INFN-LNF collider performs high-resolution X-ray spectroscopy of these systems using Silicon Drift Detectors. The recent measurement on kaonic neon enables stringent bound-state QED tests and a pathway towards a refined determination of the charged kaon mass, while preliminary kaonic fluorine data demonstrate the potential to probe strong-field QED effects. These results highlight the role of SIDDHARTA-2 in advancing high precision QED studies with hadronic atoms.
Clozza, F., Abbene, L., Artibani, F., Bazzi, M., Borghi, G., Bosnar, D., et al. (2026). QED precision studies in kaonic atoms with SIDDHARTA-2. IL NUOVO CIMENTO C, 49(5-6) [10.1393/ncc/i2026-26158-4].
QED precision studies in kaonic atoms with SIDDHARTA-2
Abbene L.;Buttacavoli A.;Principato F.;
2026-01-01
Abstract
Kaonic atoms, where a negatively charged kaon replaces an electron, provide a unique system for precision studies of bound-state and strong-field quantum electrodynamics (QED). The SIDDHARTA-2 experiment at the DAΦNE at INFN-LNF collider performs high-resolution X-ray spectroscopy of these systems using Silicon Drift Detectors. The recent measurement on kaonic neon enables stringent bound-state QED tests and a pathway towards a refined determination of the charged kaon mass, while preliminary kaonic fluorine data demonstrate the potential to probe strong-field QED effects. These results highlight the role of SIDDHARTA-2 in advancing high precision QED studies with hadronic atoms.
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