Doubly charged scalars and vector-like leptons confronting the muon g-2 anomaly and Higgs vacuum stability

Understand

The present work introduces new scalar and fermionic degrees of freedom to the Standard Model.

• While the scalar sector is augmented by a complex scalar triplet and a doubly charged scalar singlet, the fermionic sector is extended by two copies of vector-like leptons.
• Of these, one copy is an $SU(2)_L$ singlet while the other, an $SU(2)_L$ doublet.
• We explain how this combination can offer a solution to the muon g-2 anomaly and also lead to non-zero neutrino masses.