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

VALUE (fb) CL% DOCUMENT ID TECN  COMMENT
• • • We do not use the following data for averages, fits, limits, etc. • • •
$<94$ 95 1
 2017 AB
CMS ${{\mathit \ell}}$+jets, ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$ +jets channels
1  SIRUNYAN 2017AB based on 2.6 fb${}^{-1}$ of data. A multivariate analysis is used to discriminate between ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit t}}{{\overline{\mathit t}}}$ signal and ${{\mathit t}}{{\overline{\mathit t}}}$ background. A combination with a previous search (CMS, KHACHATRYAN 2016BJ) in the same-sign dilepton channel gives an upper limit of 69 fb (95$\%$ CL), corresponding to 7.4$\cdot{}$(SM prediction).
References:
 SIRUNYAN 2017AB
PL B772 336 Search for Standard Model Production of Four Top Quarks in Proton-Proton Collisions at $\sqrt {s }$ = 13 TeV
 KHACHATRYAN 2016BJ
EPJ C76 439 Search for New Physics in Same-sign Dilepton Events in Proton-Proton Collisions at $\sqrt {s }$ = 13 TeV