Accommodating three low-scale anomalies (g-2, Lamb shift, and Atomki) in the framed Standard Model

摘要

The framed Standard Model (FSM) predicts a 0(+) boson with mass around 20 MeV in the "hidden sector," which mixes at tree level with the standard Higgs hW and hence acquires small couplings to quarks and leptons which can be calculated in the FSM apart from the mixing parameter rho Uh. The exchange of this mixed state U will contribute to g - 2 and to the Lamb shift. By adjusting rho Uh alone, it is found that the FSM can satisfy all present experimental bounds on the g - 2 and Lamb shift anomalies for mu and e, and for the latter for both hydrogen and deuterium.