${\mathit {\mathit t}}$-quark EW Couplings

${{\mathit W}}$ helicity fractions in top decays. ${{\mathit F}_{{{0}}}}$ is the fraction of longitudinal and ${{\mathit F}_{{{+}}}}$ the fraction of right-handed ${{\mathit W}}$ bosons. ${{\mathit F}_{{{{V+A}}}}}$ is the fraction of $\mathit V+\mathit A$ current in top decays. The effective Lagrangian (cited by ABAZOV 2008AI) has terms f${}^{L}_{1}$ and f${}^{R}_{1}$ for $\mathit V−\mathit A$ and $\mathit V+\mathit A$ couplings, f${}^{L}_{2}$ and f${}^{R}_{2}$ for tensor couplings with b$_{R}$ and b$_{L}$ respectively.

$\mathit CP$-odd EW dipole couplings

INSPIRE   JSON PDGID:
Q007A09
VALUE DOCUMENT ID TECN  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
$-2.7 < c{}^{I}_{t W} < 2.5$ 1
HAYRAPETYAN
2025AJ
 
CMS ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit Z}}$, ${{\mathit t}}{{\mathit Z}}{{\mathit q}}$
$-0.2 <c{}^{I}_{t Z} < 2.0$ 1
HAYRAPETYAN
2025AJ
 
CMS ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit Z}}$, ${{\mathit t}}{{\mathit Z}}{{\mathit q}}$
1  HAYRAPETYAN 2025AJ based on 173 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ data at $\sqrt {s }$ = 13 TeV and 13.6 TeV. $\mathit CP$-odd observables constructed using machine-learning techniques are exploited. The obtained results are consistent with the SM prediction within 2$\sigma $. The obtained limits are for the Wilson coefficients of CP-odd dimension-6 SMEFT operators.
References