Speaker
Description
Experimental hints for lepton-flavor universality violation in the muon's magnetic moment as well as neutral- and charged-current B-meson decays require Standard-Model extensions by particles such as leptoquarks that generically lead to unacceptably fast rates of charged lepton flavor violation and proton decay. We propose a model based on a gauged U(1)(Lμ−Lτ) that eliminates all these unwanted decays by symmetry rather than finetuning and efficiently explains (g−2)_μ, R_K(∗), R_D(∗), and neutrino masses. The U(1)(Lμ−Lτ) furthermore acts as a stabilizing symmetry for dark matter and the light Z′ gauge boson mediates velocity-dependent dark-matter self-interactions that resolve the small-scale structure problems. Lastly, even the Hubble tension can be ameliorated via the light Z′ contribution to the relativistic degrees of freedom.
