Violation of custodial symmetry from W-boson mass measurements

Abstract

The new measurement of the $W$-boson mass from the CDF collaboration shows a significant tension with the Standard Model prediction. We quantify this discrepancy within a state-of-the-art analysis of electroweak precision data and scrutinize the leading deformations of the Standard Model Effective Field Theory arising at dimension six. We find evidence for a non-zero value of the $T$ parameter, i.e. for a novel source of violation of custodial symmetry, pointing to physics beyond the Standard Model at the 4.5$\sigma$ level. We contextualize the implications of our findings in light of other present anomalies in Particle Physics.

8 pages, 4 figures and 2 tables

References in corpus (14)

• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm
• The anomalous magnetic moment of the muon in the Standard Model
• The Minimal Set of Electroweak Precision Parameters
• Top, Higgs, Diboson and Electroweak Fit to the Standard Model Effective Field Theory
• The muon $g$-2 and $\Delta \alpha$ connection
• Basis-independent methods for the two-Higgs-doublet model III: The CP-conserving limit, custodial symmetry, and the oblique parameters S, T, U
• The muon g-2 and the bounds on the Higgs boson mass
• A Twisted Custodial Symmetry in the Two-Higgs-Doublet Model
• Measurement of the W boson mass
• The two-loop electroweak bosonic corrections to ${\sin }^2{\theta }_{\mathrm{eff}}^{\mathrm{b}}$
• On the significance of new physics in $b\to s{\ell }^{+}{\ell }^{-}$ decays
• $B$ anomalies under the lens of electroweak precision
• Ten Lectures on the ElectroWeak Interactions
• Custodial Symmetry (Violation) in SMEFT

Cited by in corpus (25)

• Excesses in the low-mass Higgs-boson search and the W-boson mass measurement
• Interpreting the $W$-mass anomaly in the vectorlike quark models
• $W$ boson mass shift and muon magnetic moment in the Zee model
• Dark photon kinetic mixing effects for the CDF W-mass measurement
• Beta-decay implications for the W-boson mass anomaly
• Leptoquark-vectorlike quark model for the CDF $m_W$, $(g-2{)}_{\mu }$, $R_{K^{(\ast )}}$ anomalies and neutrino mass
• A leptoquark and vector-like quark extended model for the simultaneous explanation of the $W$ boson mass and muon $g-2$ anomalies
• Electroweak dark matter model accounting for the CDF $W$-mass anomaly
• Changing patterns in electroweak precision with new color-charged states: Oblique corrections and the $W$ boson mass
• Constraints on the dark photon from parity violation and the $W$ mass
• New physics interpretation of $W$-boson mass anomaly
• Machine learning the trilinear and light-quark Yukawa couplings from Higgs pair kinematic shapes
• The CDF W-mass, muon g-2, and dark matter in a $U(1{)}_{L_{\mu }-L_{\tau }}$ model with vector-like leptons
• Corrections to electroweak precision observables from mixings of an exotic vector boson in light of the CDF $W$-mass anomaly
• Light scalars within the $\mathcal{C}\mathcal{P}$-conserving Aligned-two-Higgs-doublet model
• $Z$ boson mixing and the mass of the $W$ boson
• Novel effects of the $W$-boson mass shift in the 3-3-1 model
• The $W\ell \nu$-vertex corrections to W-boson mass in the R-parity violating MSSM
• The $\rho$ parameter and the CDF W-mass anomaly: observations on the role of scalar triplets
• CDF-II W boson mass in the Dirac Scotogenic model
• $W$-Boson Mass Anomaly from a General $SU(2{)}_L$ Scalar Multiplet
• $E_6$ Models in Light of Precision $M_W$ Measurements
• An alternative gauged $U(1{)}_R$ symmetric model in light of the CDF II $W$ boson mass anomaly
• Higgs Quadruplet Impact on $W$ Mass Shift, Dark Matter, and LHC Signatures
• Accommodating the CDF W-boson Mass Measurement in the Beautiful Mirror Model