# t-channel Single ${{\boldsymbol t}}$ Production Cross Section in ${{\boldsymbol p}}{{\boldsymbol p}}$ Collisions at $\sqrt {s }$ = 13$~$TeV INSPIRE search

VALUE (pb) DOCUMENT ID TECN  COMMENT
• • • We do not use the following data for averages, fits, limits, etc. • • •
$130$ $\pm1$ $\pm19$ 1
 2020 D
CMS ${\mathit \sigma (}$ ${{\mathit t}}{{\mathit q}}{)}$, ${{\mathit \ell}}+\not E_T$+ ${}\geq{}$2 ${{\mathit j}}$
$77$ $\pm1$ $\pm12$ 1
 2020 D
CMS ${\mathit \sigma (}$ ${{\overline{\mathit t}}}{{\mathit q}}{)}$, ${{\mathit \ell}}+\not E_T$+ ${}\geq{}$2 ${{\mathit j}}$
$156$ $\pm5$ $\pm27$ $\pm3$ 2
 2017 H
ATLS ${\mathit \sigma (}$ ${{\mathit t}}{{\mathit q}}{)}$, ${{\mathit \ell}}+\not E_T$+2 j (1${{\mathit b}}$, 1 forward j)
$91$ $\pm4$ $\pm18$ $\pm2$ 2
 2017 H
ATLS ${\mathit \sigma (}$ ${{\overline{\mathit t}}}{{\mathit q}}{)}$, ${{\mathit \ell}}+\not E_T$+2 j (1${{\mathit b}}$, 1 forward j)
$154$ $\pm8$ $\pm9$ $\pm19$ $\pm4$ 3
 2017 AA
CMS ${\mathit \sigma (}$ ${{\mathit t}}{{\mathit q}}{)}$, ${{\mathit \mu}}+{}\geq{}$2 j (1${{\mathit b}}$)
$85$ $\pm10$ $\pm4$ $\pm11$ $\pm2$ 3
 2017 AA
CMS ${\mathit \sigma (}$ ${{\overline{\mathit t}}}{{\mathit q}}{)}$, ${{\mathit \mu}}+{}\geq{}$2 j (1${{\mathit b}}$)
1  SIRUNYAN 2020D based on 35.9 fb${}^{-1}$ of data. Different categories of jet and b jet multiplicity and multivariate discriminators are used to separate signal and background events. The cross section ratio is measured to be ${\mathit \sigma (}$ ${{\mathit t}}{{\mathit q}}{)}/{\mathit \sigma (}$ ${{\overline{\mathit t}}}{{\mathit q}}{)}$ = $1.68$ $\pm0.02$ $\pm0.05$. CKM matrix element is obtained as $\vert$f$_{LV}\mathit V_{\mathit tb}\vert$ = $0.98$ $\pm0.07$(exp)$\pm0.02$(theo) where f$_{LV}$ is an anomalous form factor. All results are in agreement with the SM.
2  AABOUD 2017H based on 3.2 fb${}^{-1}$ of data. A maximum-likelihood fit to neural-network discriminant distributions is used to separate signal and background events. The third error is for luminosity. The cross section ratio is measured to be ${\mathit \sigma (}$ ${{\mathit t}}{{\mathit q}}{)}/{\mathit \sigma (}$ ${{\overline{\mathit t}}}{{\mathit q}}{)}$ = $1.72$ $\pm0.09$ $\pm0.18$. A lower limit $\vert \mathit V_{\mathit tb}\vert$ $>$ 0.84 (95$\%$ CL) is obtained. All results are in agreement with the SM.
3  SIRUNYAN 2017AA based on 2.2 fb${}^{-1}$ of data. A multivariate discriminator is used to separate signal and background events. The four errors are from statitics, experimental systematics, theory, and luminosity. The cross section ratio is measured to be ${\mathit \sigma (}$ ${{\mathit t}}{{\mathit q}}{)}/{\mathit \sigma (}$ ${{\overline{\mathit t}}}{{\mathit q}}{)}$ = $1.81$ $\pm0.18$ $\pm0.15$. CKM matrix element is obtained as $\vert \mathit V_{\mathit tb}\vert$ = $1.05$ $\pm0.07$(exp)$\pm0.02$(theo). All results are in agreement with the SM.
References:
 SIRUNYAN 2020D
PL B800 135042 Measurement of the single top quark and antiquark production cross sections in the $t$ channel and their ratio in proton-proton collisions at $\\sqrt{s}=$ 13 TeV
 AABOUD 2017H
JHEP 1704 086 Measurement of the Inclusive Cross-Sections of Single top-Quark and top-Antiquark ${\mathit {\mathit t}}$-Channel Production in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 13 TeV with the ATLAS Detector
 SIRUNYAN 2017AA
PL B772 752 Cross Section Measurement of ${\mathit {\mathit t}}$-Channel Single Top Quark Production in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 13 TeV