We propose a next-generation precision measurement of the muon anomalous magnetic moment (muon g−2), at the High Intensity Heavy-Ion Accelerator Facility (HIAF) in China. The project, named CANTON-μ (Coherent Anomalous magNetic momenT ObservatioN with muon), represents the first muon g−2 experiment aimed at surpassing Fermilab precision. It introduces novel approaches based on HIAF's intense...
The spontaneous conversion of muonium to antimuonium is one of the most interesting charged lepton flavor violating processes, offering a sensitive probe of potential new physics and serving as a tool to constrain the parameter space beyond the Standard Model. The Muonium-to-Antimuonium Conversion Experiment (MACE) is designed to utilize a high-intensity muon beam, a Michel electron magnetic...
The muon anomalous magnetic moment, $(g-2)_{\mu}$, and the electric dipole moment (EDM) are sensitive probes of physics beyond the Standard Model (SM). Recent measurements of $(g-2)_{\mu}$ show a tension with the SM prediction based on electron-positron collision data, while calculations based on lattice QCD are in better agreement with the experimental value. Clarifying this discrepancy is...
We propose here a set of new proposals and some preliminary experimental results involving probing and knocking with muons (PKMu). There is a wealth of rich physics to explore with GeV muon beams either from dedicated beam or cosmic source. Examples include but not limited to: muon scattering can occur at large angles, providing evidence of potential muon-philic dark matter or dark mediator...
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...
Mu2e will search for coherent, neutrinoless muon-to-electron conversion in aluminum, $\mu^- + {}^{27}\mathrm{Al}\to e^- + {}^{27}\mathrm{Al}$, a charged-lepton-flavor-violating process whose observation would be unambiguous evidence for physics beyond the Standard Model. The signal is a monoenergetic electron near $104.97\ \mathrm{MeV}$, close to the endpoint of the muon decay-in-orbit...
