Quantum mechanics

Algorithm

Lepton

Vector boson

Anomalous magnetic dipole moment

Nuclear physics

Particle physics

Degenerate energy levels

Scalar boson

Neutrino

Lepton number

Physics

Scalar (mathematics)

Mathematics

Muon

Geometry

Electron

Dark matter

Boson

Physical review. D/Physical review. D.

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.

<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi></mml:math> boson mass and muon <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>g</mml:mi><mml:mo>−</mml:mo><mml:mn>2</mml:mn></mml:math> in a lepton portal dark matter model

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