New physics interpretation of W-boson mass anomaly

The CDF Collaboration has recently reported an updated result on the W -boson mass measurement, showing a 7 sigma deviation from the standard model prediction. The discrepancy may indicate new contributions to the Fermi coupling constant. We study simple extensions of the standard model by introducing an extra scalar, fermion, or vector field. It is found that the tension implies the new physics existing in multi-TeV scales if the new coupling to the electron and/or muon is of order unity.

Automated summary

Recently, the CDF Collaboration reported an updated result on the measurement of the W-boson mass, which showed a deviation of 7 sigma from the standard model prediction. This discrepancy may indicate the presence of new contributions to the Fermi coupling constant. Simple extensions of the standard model were studied, and it was found that the tension implies the existence of new physics at multi-TeV scales if the new coupling to the electron and/or muon is of order unity.