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

${{\mathit t}}$-Quark Yukawa Coupling from ${{\mathit t}}{{\overline{\mathit t}}}$ Kinematic Distributions in ${{\mathit p}}{{\mathit p}}$ Collisions

INSPIRE   PDGID:
Q007A03
The ratio of ${{\mathit t}}$-quark Yukawa coupling to its standard model predicted value.
VALUE DOCUMENT ID TECN  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
$1.16$ ${}^{+0.24}_{-0.35}$ 1
SIRUNYAN
2020BH
CMS ${{\mathit \ell}}{{\mathit \ell}}$ (${{\mathit \ell}}={{\mathit e}},{{\mathit \mu}}$) + jets (${}\geq{}2{{\mathit b}}$j) + $\not E_T$
$1.07$ ${}^{+0.34}_{-0.43}$ 2
SIRUNYAN
2019BY
CMS ${{\mathit \ell}}$+jets, ${{\mathit t}}{{\overline{\mathit t}}}$ threshold
1  SIRUNYAN 2020BH based on 137 ${\mathrm {fb}}{}^{-1}$ of data at $\sqrt {s }$ = 13 TeV. Kinematic distributions of ${{\mathit t}}{{\overline{\mathit t}}}$ are compared with predictions by different values of the top Yukawa coupling in loop corrections, where the scaling of the SM coupling is used within the $\kappa $-framework. The $\not E_T$ cut applies only to the same-flavor dilepton, not ${{\mathit e}}{{\mathit \mu}}$ events.
2  SIRUNYAN 2019BY based on 35.8 ${\mathrm {fb}}{}^{-1}$ of data at $\sqrt {s }$ = 13 TeV. Experimental sensitivity is enhanced in the low $\mathit M_{{{\mathit t}} {{\overline{\mathit t}}}}$ region. The distributions of $\mathit M_{{{\mathit t}} {{\overline{\mathit t}}}}$, $\vert \mathit y_{t}$ $−$ $\mathit y_{{{\overline{\mathit t}}}}\vert $, and the number of reconstructed jets are compared with predictions by different Yukawa couplings which include NNLO QCD and NLO EW corrections.
References