New physics interpretation of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi></mml:math>-boson mass anomaly
Motoi Endo, Satoshi Mishima
Abstract
The CDF Collaboration has recently reported an updated result on the $W$-boson mass measurement, showing a $7\ensuremath{\sigma}$ 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.
Topics & Concepts
MuonPhysicsParticle physicsPhysics beyond the Standard ModelBosonCoupling constantCoupling (piping)Anomaly (physics)Scalar (mathematics)FermionHiggs bosonQuantum mechanicsMathematicsGeometryEngineeringMechanical engineeringParticle physics theoretical and experimental studiesDark Matter and Cosmic PhenomenaCosmology and Gravitation Theories