High Precision X-Ray Measurements 2025

Session

Fundamental Physics

Jun 17, 2025, 3:00 PM

Aula B. Touschek (Laboratori Nazionali di Frascati INFN)

Conveners

Fundamental Physics: 1

• Magdalena Skurzok (Jagiellonian University)

Fundamental Physics: 2

• Simone Manti (Istituto Nazionale di Fisica Nucleare)

11. Elusive quark state studied by X-rays

Slawomir Wycech

6/17/25, 3:00 PM

The Λ(1405) state is a basic element used to affect K-mesic atoms and built K-mesic nuclear states. The common understanding is that this state is predominantly a quasi-bound state of anti- K meson and a proton. Scattering data in Kp channel and Σπ channel allow to built interaction models. However, these models differ strongly if extrapolated to energies below the Kp threshold...

29. High-precision muonic atom x-ray spectroscopy with a metallic magnetic calorimeter

Andreas Knecht (Paul Scherrer Institute)

6/17/25, 3:30 PM

Muonic atom spectroscopy is a well-established method to accurately determine the root-mean-square (RMS) radii of nuclear charge density distributions and has already delivered the most accurate results for very light (Z < 3) as well as heavier nuclei (Z > 10). However, a gap remains for muonic atoms from lithium to neon due to technological limitations in the relevant energy range (~20–200...

39. Searching for signal of Quantum Collapse and Quantum Gravity in the cosmic silence of the Gran Sasso Underground Laboratories

Kristian Piscicchia (Istituto Nazionale di Fisica Nucleare)

6/17/25, 3:50 PM

The VIP experiment is pursuing experimental studies of Quantum Mechanics (QM) foundations, investigating models of dynamical wave function collapse and performing high sensitivity tests of the Pauli Exclusion Principle (PEP) for electrons.
Unification of QM and General Relativity is probably the main ambition of modern physics. Motivated by the awareness that space-time fluctuations would...

37. Probing Fundamental Interactions with Kaonic Atom X-ray Spectroscopy: From strong-field QED to low-energy QCD

Francesco Sgaramella (INFN-LNF)

6/19/25, 3:00 PM

X-ray spectroscopy of kaonic atoms provides a unique tool for fundamental physics, enabling precision tests of quantum electrodynamics (QED) in strong electromagnetic fields and the exploration of the strong interaction at low energies with strangeness. In these exotic systems, the electromagnetic cascade of the kaon reveals both QED and strong-interaction effects in the innermost atomic...

47. Novel CZT Detectors for kaonic atoms spectroscopy

Francesco Artibani (Istituto Nazionale di Fisica Nucleare)

6/19/25, 3:30 PM

Kaonic atoms spectroscopy provides essential observables for investigating low-energy strong interactions in systems with strangeness. I shall present an overview of the SIDDHARTA-2 collaboration’s efforts in this field, with a particular focus on the development and first use of a novel Cadmium-Zinc-Telluride (CZT) detector system for studying intermediate-mass kaonic atoms.
This innovative...

16. Studies of the absorption parameter 3γ/2γ in positronium decays

Kamila Kasperska

6/19/25, 3:50 PM

During Positron Emission Tomography (PET), as much as 40% of annihilations happen through the formation of positronium inside the patient’s body. Its properties, such as the fraction of positronium annihilations into three photons (3γ/2γ), are highly influenced by the tissue’s submolecular architecture. This has led to the development of a novel PET imaging techniques - positronium imaging -...