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7/28/25, 9:40 AM
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Ubirajara van Kolck (ECT*, Trento)7/28/25, 10:00 AM
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Randolf Pohl (Uni Mainz)7/28/25, 10:20 AM
Muonic atoms are the ideal tool to study nuclear properties. Close collaboration of theory and experiment is crucial for achieving the best possible precision for the charge radii.
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Mikhail Gorshteyn (JGU Mainz)7/28/25, 11:30 AM
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Andreas Fleischmann (KIP, Heidelberg University)7/28/25, 12:10 PM
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Daniel Kreuzberger (Kirchhoff-Institut für Physik, Universität Heidelberg)7/28/25, 3:00 PM
The QUARTET collaboration aims to improve the accuracy of absolute nuclear charge radii of light atoms from Li to Ne up to one order of magnitude through high resolution x-ray spectroscopy of muonic atoms. Metallic Magnetic Calorimeters (MMCs) operated at mK have shown to be ideal detectors in a test experimentat PSI. MMCs are characterized by a high resolving power of several thousand, a...
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César Godinho (LIBPhys-UNL)7/28/25, 3:40 PM
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Gonçalo Baptista (Laboratoire Kastler Brossel)7/28/25, 4:50 PM
The PAX experiment is a new effort to improve the study of x ray transitions in antiprotonic atoms for testing Bound State QED (BSQED). By selecting transitions between circular Rydberg states, where the bound antiproton resides orders of magnitude closer to the nucleus than an electron, while avoiding any nuclear overlap with its wavefunction, the dominant uncertainties that limit the...
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Fabian Heiße7/28/25, 5:30 PM
The gyromagnetic g-factor of bound electrons in highly charged ions is ideal for testing quantum electrodynamics (QED) in the strongest electric fields. Additionally, the bound electron g factor is significantly influenced by the nuclear properties due to the close vicinity of the electrons to the nucleus. This allows the extraction of high precision nuclear charge radii. The ALPHATRAP...
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7/28/25, 6:10 PM
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Ben Ohayon (Technion IIT)7/29/25, 9:40 AM
The QUARTET experiment aims to improve the radii of light nuclei by an order of magnitude. To do so we employ a novel quantum sensing technology for photon energies—metallic magnetic calorimeters. We have taken data with enriched targets of 6Li, 7Li, 9Be, 10B and 11B with enough statistical accuracy to significantly improve their radii. In this talk I will show preliminary results from the...
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Clara Peset (University of Madrid Complutense)7/29/25, 10:20 AM
Experimental setups involving laser spectroscopy of muonic systems have undergone a revolution during the past two decades, providing data with unprecedented precision. The combined use of effective field theories, precision computations, and highly accurate experimental data allows for the spectroscopy of muonic atoms to be a competent and reliable testing ground for new physics in the...
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Zoltan Harman (Max Planck Institute for Nuclear Physics)7/29/25, 11:30 AM
High-precision spectroscopy of one- and few-electron ions provides stringent tests of the Standard Model in regimes of strong nuclear fields. Inner-shell electrons experience extreme binding, leading to relativistic dynamics and significant quantum electrodynamic contributions. Our theoretical framework includes rigorous treatments of these effects to enable accurate predictions of energy...
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Wilfried Nörtershäuser (TU Darmstadt)7/29/25, 12:10 PM
The atomic structure of few-electron systems is well understood and allows for accurate ab initio calculations of mass-shift and field-shift factors in non-relativistic quantum electrodynamics calculations (NR-QED) to extract precise nuclear charge radii. We have started to determine absolute and differential charge radii of the light elements from Be to N using collinear laser spectroscopy....
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Günter Weber (Helmholtz Institute Jena)7/29/25, 3:00 PM
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Shikha Rathi (The Helen Diller Quantum Center, Department of Physics, Technion-Israel Institute of Technology, Haifa, 3200003, Israel)7/29/25, 3:40 PM
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Thomas Elias COCOLIOS (KU Leuven)7/29/25, 4:50 PM
Odd-Z and heavy elements do not possess enough stable isotopes to allow common approaches for the determination of absolute charge radii. Novel techniques are required, and in particular the production of the target material is a particular challenge. Key cases arising from the ERC NSHAPE programme will be brought forward.
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marie deseyn (KU Leuven)7/29/25, 5:30 PM
The nuclear charge radii of silicon isotopes provide valuable input for searches for physics beyond the Standard model and for constraining the neutron equation of state. Therefore, laser spectroscopy on {28-32}Si has recently been performed and is planned for other isotopes in the near future. However, for extraction of the nuclear charge radii from laser spectroscopy, the mass and field...
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7/29/25, 6:10 PM
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Sonia Bacca7/30/25, 9:40 AM
I will present an overview of our calculations of nuclear structure effects in light muonic atoms. I will present our published work for s-shell nuclei, and discuss strategies to tackle p-shell nuclei
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Mehdi Drissi (TRIUMF)7/30/25, 10:20 AM
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Saori Pastore (Washington University & Los Alamos National Laboratory)7/30/25, 11:30 AM
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Natalia S. Oreshkina (MPIK (Heidelberg))7/30/25, 12:10 PM
In my talk I will present the latest improvements in the theory for heavy muonic atoms and discuss the exsisting limitations for further improvemets.
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Ashot Gasparian (NC A and T State University, NC, USA)7/31/25, 9:40 AM
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Ahmed Ouf (Johannes gutenberg universität mainz)7/31/25, 10:20 AM
The HyperMu experiment at PSI aims at the first measurement of the ground state hyperfine splitting in muonic hydrogen (μp) with 1 ppm precision using pulsed laser spectroscopy. This accuracy allows for a precise extraction of the proton structure contributions, including the Zemach radius and the proton polarizability. To measure the ground state hyperfine splitting in μp, we are developing...
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Sotiris Pitelis (JGU Mainz)7/31/25, 11:30 AM
Atomic spectroscopy experiments at the precision frontier allow us to study low-energy nuclear structure, test bound-state QED, refine fundamental constants, and potentially find New Physics. As experimental precision is continuously improved, it is a timely task to re-examine the sensitivity of specific bound states to New Physics scenarios. Depending on their Bohr radii, hydrogen-like...
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Vadim Lensky (JGU Mainz)7/31/25, 12:10 PM
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Chen Ji (Central China Normal University)7/31/25, 3:00 PM
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Tim Egert7/31/25, 3:40 PM
We present a data‑driven analysis of dipole‑strength functions across the nuclear chart, employing an artificial neural network to model and predict nuclear dipole responses. The network is trained on experimentally measured dipole‑strength functions for 216 nuclei and tested on an additional set of 10 nuclei with available data. It not only reproduces known responses with high fidelity but...
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7/31/25, 4:50 PM
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Diana Prado Lopes Aude Craik (ETH Zürich)8/1/25, 9:40 AM
At the TIQI group at ETH, we recently measured isotope shifts on the 729nm electric quadrupole transition between pairs of co-trapped calcium ions at 100mHz precision, two orders of magnitude below the previous best measurement. We combined our measurements with IS measurements made by the group of Piet Schmidt on the 570nm transition in Ca14+ and improved nuclear mass measurements made by the...
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Robert Potvliege (Durham University)8/1/25, 10:20 AM
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Xu Feng (Peking University)8/1/25, 11:30 AM
I will discuss two-photon exchange (TPE) corrections to muonic atoms based on Lattice QCD, including our recent work on the subtraction function in the forward Compton amplitude.
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8/1/25, 12:10 PM
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Andrea Vacchi (INFN TS & UniUd)
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