Conveners
Theory: Muon anomalies and new physics
- Un-Ki Yang (Seoul National University (KR))
In this talk, I will discuss a few gauge extensions of the SM where one can accommodate the muon g-2 and/or B anomalies.
We propose an extension of the Standard Model (SM) for radiative neutrino mass by introducing a dark U(1) gauge symmetry. We show that the tiny neutrino mass and dark matter candidates are naturally accommodated. Motivated by the recent measurement of muon (g−2) indicating 4.2 deviation from the SM prediction, we examine how this deviation can be explained in this model.
The type-X 2HDM is known to explain the long-standing muon g-2 anomaly due to the presence of a light CP-odd Higgs boson which becomes leptophilic at large tanbeta. The model can be extended with an even lighter singlet boson contributing to the muon g-2. We discuss the current experimental limits on the model and the discovery potential of the extra (Higgs) bosons at lepton and proton colliders.
The recent Fermilab measurement of the muon anomalous magnetic moment yields about 4.2 sigma deviation from the SM prediction. In the Type-X two Higgs doublet model with the Higgs alignment, we study the consequence of imposing the observed muon g-2, along with the theoretical stabilities, electroweak oblique parameters, Higgs precision data, and direct searches at the LEP and LHC. We found...
We entertain the option of scalar leptoquarks to explain the anomalies in the semi-leptonic decays of B-mesons and the discrepancies in the lepton (g−2)l's including the recent results at Fermilab E989. The RK(∗) and RD(∗) anomalies can be accommodated by the specific couplings for triplet and singlet leptoquarks, respectively, subject to the bounds from B→Kνν¯. We discuss the correlation...
Recently reported anomalies in various B meson decays and also in the anomalous magnetic moment of muon (g − 2) motivate us to consider a particular extension of the standard model incorporating new interactions in lepton and quark sectors simultaneously. Our minimal choice would be leptoquark. In particular, we take vector leptoquark (U1) and comprehensively study all related observables.
