${\mathit {\mathit t}}$-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.

Mixing Angle of $\mathit CP$-even and $\mathit CP$-odd ${{\mathit t}}$-Quark Yukawa Couplings

INSPIRE   JSON  (beta) PDGID:
Q007MAH
VALUE ($^\circ{}$) DOCUMENT ID TECN  COMMENT
$11$ ${}^{+52}_{-73}$ 1
AAD
2024J
 ATLS ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}}$, ${{\mathit t}}{{\mathit H}}$ (${{\mathit H}}$ $\rightarrow$ ${{\mathit b}}{{\mathit b}}$)
1  AAD 2024J based on 139 ${\mathrm {fb}}{}^{-1}$ of data at $\sqrt {s }$ = 13 TeV. Events containing one or two leptons (${{\mathit e}}$, ${{\mathit \mu}}$) are used. The SM branching ratio for the Higgs boson decay into ${{\mathit b}}{{\mathit b}}$ is assumed. The result is consistent with the SM prediction of no $\mathit CP$-odd coupling, $\alpha $ = 0.
References