Beta-decay implications for the W-boson mass anomaly

Abstract

We point out the necessity to consider $\beta$-decay observables in resolutions of the $W$-boson anomaly in the Standard Model Effective Field Theory that go beyond pure oblique corrections. We demonstrate that present global analyses that explain the $W$-boson mass anomaly predict a large, percent-level, violation of first-row CKM unitarity. We investigate what solutions to the $W$-boson mass anomaly survive after including $\beta$-decay constraints.

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• Corrections to electroweak precision observables from mixings of an exotic vector boson in light of the CDF $W$-mass anomaly
• $Z$ boson mixing and the mass of the $W$ boson
• CDF-II W boson mass in the Dirac Scotogenic model
• An alternative gauged $U(1{)}_R$ symmetric model in light of the CDF II $W$ boson mass anomaly
• Vector-like quark doublets, weak-basis invariants and CP violation
• Accommodating the CDF W-boson Mass Measurement in the Beautiful Mirror Model
• Round table on Standard Model Anomalies
• Pion $\beta$ decay and $\tau \to \pi \pi {\nu }_{\tau }$ beyond leading logarithms
• Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap