NuFact 2026 - The 27th International Workshop on Neutrinos from Accelerators

Session

WG4 — Charged Lepton Flavour Violation II & Precision Muon Physics

Sep 3, 2026, 3:25 PM

Tsung-Dao Lee Institute

Conveners

WG4 — Charged Lepton Flavour Violation II & Precision Muon Physics

• Ce Zhang (University of Liverpool)

17. Searches for Charged Lepton Flavour Violation at Belle and Belle II

李文哲 (Wenzhe Li)

9/3/26, 3:25 PM

WG4: Muon Physics

Oral contribution

The Belle and Belle II experiments have collected a $1.6~\mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at center-of-mass energies near the $\Upsilon(nS)$ resonances. We present searches for the decays $\tau \to \mu\gamma$, $\tau \to \ell\eta$, $\tau\to \ell\pi^0$, and $\tau^-\to \ell^-\alpha$, where $\ell = e$ or $\mu$ and $\alpha$ is an invisible scalar particle. In addition, we...

60. Search for rare and lepton-flavor-violating Higgs boson decays at the ATLAS experiment

Bo Liu (Nankai University)

9/3/26, 3:50 PM

WG4: Muon Physics

Oral contribution

The Standard Model predicts several rare decay processes of the Higgs boson, including decay to a Z boson and a photon (H->Zgam), decay to a pair of muons (H->mumu), and decay to a pair of electrons (H->ee). The lepton-flavor-violating (LFV) decay of the Higgs boson, on the other hand, is forbidden in the Standard Model but allowed in new physics models. Search for rare and LFV decays of the...

58. The MUonE Experiment and First Results from the 2025 Test Run

Mr 高乐耘 (Leyun Gao) (Peking University)

9/3/26, 4:15 PM

WG4: Muon Physics

Oral contribution

The MUonE experiment, currently under preparation at CERN, aims to measure the running of the electromagnetic coupling $\alpha$ in the elastic $\mu e$ scattering process, from which the dominant hadronic contribution to the anomalous magnetic moment of the muon can be extracted. We present performance results from the Phase 1 MUonE test-beam campaign carried out in summer 2025 at the CERN SPS...

120. Anti-neutrino Nuclear Responses by High Energy-Resolution Gamma-ray Studies Following Ordinary Muon Capture on Molybdenum

IZYAN HAZWANI BINTI HASHIM (Universiti Teknologi Malaysia)

9/3/26, 4:40 PM

WG4: Muon Physics

Oral contribution

Ordinary Muon Capture (OMC) provides a unique experimental avenue to probe the β+ type nuclear responses essential for understanding double beta decays (DBDs) and astrophysical neutrino interactions. This study leverages high energy-resolution gamma-ray spectroscopy to meticulously identify transition channels in enriched and natural molybdenum. By utilizing high-purity germanium (HPGe)...