We report a new measurement of the n= 2 Lamb shift in Muonium. Our result of 1047.2 (2.3)
stat (1.1) syst MHz comprises an order of magnitude improvement upon the previous best …

The hadronic vacuum polarization (HVP) contributions to the muon g-2 are the crucial
quantity to resolve whether new physics is present or not in the comparison between the …

We consider different types of storage rings as precision probes of axion-mediated
monopole-dipole forces. We show that current and planned experiments aiming to measure …

In April 2021, scientists active in muon physics met to discuss and work out the physics case
for the new High-Intensity Muon Beams (HIMB) project at PSI that could deliver of order …

We present an updated value of the Muonium 1 S–2 S transition frequency, highlighting
contributions from different QED corrections as well as the large uncertainty in the Dirac …

Light scalars can in principle couple to both bulk matter and fermion spin, with hierarchically
disparate strengths. Storage ring measurements of fermion electromagnetic moments via …

The study of muonium-muonium binding and scattering is crucial for precision experiments
involving muonium. In this paper, we investigate the bound-state energies and structures of …

The study of positive muon μ+-He scattering plays an important role in precision
experiments involving positive muons. In this paper, we employed the confined variational …

We demonstrate control over the motional degrees of freedom of a cryogenic hydrogen
atomic beam using an accelerating optical lattice. For our method, we load metastable …

The anomalous magnetic moment of the muon ($\, a_ {\mu}\, $) provides a stringent test of
the quantum nature of the Standard Model (SM) and its extensions. To probe beyond the SM …