W boson mass and muon g-2 in a lepton portal dark matter model

We study a lepton portal dark matter model, motivated by the deviation of the W boson mass reported by the CDF collaboration. We introduce vectorlike leptons and a scalar dark matter (DM) that exclusively couples to the extra leptons and muon. The one-loop corrections induced by the new particles can shift the W boson mass. Besides, the discrepancy in the muon anomalous magnetic moment and the DM density can simultaneously be explained by this setup, if the vectorlike lepton is lighter than 200 GeV and nearly degenerate with the DM particle. We also see that the constraints on such a light extra lepton from the collider experiments can be evaded due to the existence of the DM particle.

Automated summary

Motivated by the deviation of the W boson mass reported by the CDF collaboration, we study a lepton portal dark matter model. In this model, vectorlike leptons and a scalar dark matter exclusively couple to the extra leptons and muon, causing one-loop corrections that can shift the W boson mass. Additionally, this setup can explain the discrepancy in the muon anomalous magnetic moment and the DM density if the vectorlike lepton is lighter than 200 GeV and nearly degenerate with the DM particle. Furthermore, the constraints from collider experiments on such a light extra lepton can be evaded due to the existence of the DM particle.