s-channel Single ${{\boldsymbol t}}$ Production Cross Section in ${{\boldsymbol p}}{{\boldsymbol p}}$ Collisions at $\sqrt {s }$ = 8 TeV INSPIRE search

VALUE (pb) DOCUMENT ID TECN  COMMENT
• • • We do not use the following data for averages, fits, limits, etc. • • •
$4.8$ $\pm0.8$ ${}^{+1.6}_{-1.3}$ 1
AAD
2016U
ATLS ${{\mathit \ell}}$ + $\not E_T$ + 2${{\mathit b}}$
$13.4$ $\pm7.3$ 2
KHACHATRYAN
2016AZ
CMS ${{\mathit \ell}}$ + $\not E_T$ + 2${{\mathit b}}$
$5.0$ $\pm4.3$ 3
AAD
2015A
ATLS ${{\mathit \ell}}$ + $\not E_T$ + 2${{\mathit b}}$
1  AAD 2016U based on 20.3 fb${}^{-1}$ of data, using a maximum-likelihood fit of a matrix element method discriminant. The same data set as in AAD 2015A is used. The result corresponds to an observed significance of 3.2 ${{\mathit \sigma}}$ .
2  KHACHATRYAN 2016AZ based on 19.7 fb${}^{-1}$ of data, using a multivariate analysis to separate signal and backgrounds. The same method is applied to 5.1 fb${}^{-1}$ of data at $\sqrt {s }$ = 7 TeV, giving $7.1$ $\pm8.1$ pb. Combining both measurements, the observed significance is 2.5 ${{\mathit \sigma}}$ . A best fit value of $2.0$ $\pm0.9$ is obtained for the combined ratio of the measured values and SM expectations.
3  AAD 2015A based on 20.3 fb${}^{-1}$ of data, using a multivariate analysis to separate signal and backgrounds. The 95$\%$ CL upper bound of the cross section is 14.6 pb. The results are consistent with the SM prediction of $5.61$ $\pm0.22$ pb at approximate NNLO.
  References:
AAD 2016U
PL B756 228 Evidence for Single top-Quark Production in the s-Channel in Proton-Proton Collisions at $\sqrt {s }$ = 8 TeV with the ATLAS Detector using the Matrix Element Method
KHACHATRYAN 2016AZ
JHEP 1609 027 Search for s Channel Single Top Quark Production in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 7 and 8 TeV
AAD 2015A
PL B740 118 Search for ${\mathit {\mathit s}}$-Channel Single Top-Quark Production in Proton-Proton Collisions at $\sqrt {s }$ = 8 TeV with the ATLAS Detector